diff --git a/CHANGELOG.md b/CHANGELOG.md
index f98d2450..6dd94d1a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,7 @@
-## 2023-10-25 v.6.4.11
+## 2023-12-12 v.6.4.12
+- Исправлена критическая ошибка при переходе в настройки модуля
+
+## 2023-12-08 v.6.4.11
 - Исправлена ошибка при передаче подписки на рекламно-информационные рассылки
 
 ## 2023-10-25 v.6.4.10
diff --git a/intaro.retailcrm/classes/general/RCrmActions.php b/intaro.retailcrm/classes/general/RCrmActions.php
index f96fc76e..3667acc2 100644
--- a/intaro.retailcrm/classes/general/RCrmActions.php
+++ b/intaro.retailcrm/classes/general/RCrmActions.php
@@ -1,13 +1,16 @@
 <?php
 
+use Bitrix\Sale\PersonType;
 use Intaro\RetailCrm\Component\ServiceLocator;
 use Bitrix\Sale\Delivery\Services\EmptyDeliveryService;
 use Bitrix\Sale\Internals\OrderPropsTable;
 use Bitrix\Sale\Internals\StatusTable;
 use Bitrix\Sale\PaySystem\Manager;
+use Intaro\RetailCrm\Service\Utils;
 use RetailCrm\Exception\CurlException;
 use RetailCrm\Exception\InvalidJsonException;
 use Intaro\RetailCrm\Service\ManagerService;
+use Bitrix\Sale\Internals\SiteCurrencyTable;
 
 IncludeModuleLangFile(__FILE__);
 
@@ -19,33 +22,19 @@ class RCrmActions
     public static $MODULE_ID = 'intaro.retailcrm';
     public static $CRM_ORDER_FAILED_IDS = 'order_failed_ids';
     public static $CRM_API_VERSION = 'api_version';
-    public const CANCEL_PROPERTY_CODE = 'INTAROCRM_IS_CANCELED';
 
     public static function getCurrencySites(): array
     {
-        global $DB;
-
         $sites = self::getSitesList();
-        $sitesLID = [];
+        $baseCurrency = CCurrency::GetBaseCurrency();
         $sitesCurrency = [];
 
         foreach ($sites as $site) {
-            $sitesLID[] = $site['LID'];
-        }
+            $siteCurrency = SiteCurrencyTable::getCurrency($site['LID']);
 
-        $currencies = $DB->Query(
-            "SELECT DISTINCT site.SMN_SITE_ID, hook_data.VALUE
-                FROM `b_landing_site` site
-                    LEFT JOIN `b_landing_hook_data` hook_data on site.ID = hook_data.ENTITY_ID
-                WHERE site.SMN_SITE_ID IN ('" . implode("', '", $sitesLID) . "')
-                AND hook_data.CODE = 'CURRENCY_ID';
-            "
-        );
-
-        while ($currencySite = $currencies->Fetch()) {
-            if (!empty($currencySite['SMN_SITE_ID'])) {
-                $sitesCurrency[$currencySite['SMN_SITE_ID']] = $currencySite['VALUE'];
-            }
+            $sitesCurrency[$site['LID']] = !empty($siteCurrency['CURRENCY'])
+                ? $siteCurrency['CURRENCY']
+                : $baseCurrency;
         }
 
         return $sitesCurrency;
@@ -68,17 +57,21 @@ class RCrmActions
 
     public static function OrderTypesList($arSites)
     {
-        $orderTypesList = array();
+        $orderTypesList = [];
+
         foreach ($arSites as $site) {
-            $personTypes = \Bitrix\Sale\PersonType::load($site['LID']);
-            $bitrixOrderTypesList = array();
+            $personTypes = PersonType::load($site['LID']);
+            $bitrixOrderTypesList = [];
+
             foreach ($personTypes as $personType) {
                 if (!array_key_exists($personType['ID'], $orderTypesList)) {
                     $bitrixOrderTypesList[$personType['ID']] = $personType;
                 }
+
                 asort($bitrixOrderTypesList);
             }
-            $orderTypesList = $orderTypesList + $bitrixOrderTypesList;
+
+            $orderTypesList += $bitrixOrderTypesList;
         }
 
         return $orderTypesList;
@@ -86,10 +79,11 @@ class RCrmActions
 
     public static function DeliveryList()
     {
-        $bitrixDeliveryTypesList = array();
+        $bitrixDeliveryTypesList = [];
         $arDeliveryServiceAll = \Bitrix\Sale\Delivery\Services\Manager::getActiveList();
         $noOrderId = EmptyDeliveryService::getEmptyDeliveryServiceId();
-        $groups = array();
+        $groups = [];
+
         foreach ($arDeliveryServiceAll as $arDeliveryService) {
             if ($arDeliveryService['CLASS_NAME'] == '\Bitrix\Sale\Delivery\Services\Group') {
                 $groups[] = $arDeliveryService['ID'];
@@ -112,11 +106,9 @@ class RCrmActions
 
     public static function PaymentList()
     {
-        $bitrixPaymentTypesList = array();
-        $dbPaymentAll = Manager::getList(array(
-            'select' => array('ID', 'NAME'),
-            'filter' => array('ACTIVE' => 'Y')
-        ));
+        $bitrixPaymentTypesList = [];
+        $dbPaymentAll = Manager::getList(['select' => ['ID', 'NAME'], 'filter' => ['ACTIVE' => 'Y']]);
+
         while ($payment = $dbPaymentAll->fetch()) {
             $bitrixPaymentTypesList[] = $payment;
         }
@@ -126,16 +118,14 @@ class RCrmActions
 
     public static function StatusesList()
     {
-        $bitrixPaymentStatusesList = array();
-        $obStatuses = StatusTable::getList(array(
-            'filter' => array('TYPE' => 'O', '=Bitrix\Sale\Internals\StatusLangTable:STATUS.LID' => LANGUAGE_ID),
-            'select' => array('ID', 'NAME' => 'Bitrix\Sale\Internals\StatusLangTable:STATUS.NAME')
-        ));
+        $bitrixPaymentStatusesList = [];
+        $obStatuses = StatusTable::getList([
+            'filter' => ['TYPE' => 'O', '=Bitrix\Sale\Internals\StatusLangTable:STATUS.LID' => LANGUAGE_ID],
+            'select' => ['ID', 'NAME' => 'Bitrix\Sale\Internals\StatusLangTable:STATUS.NAME'],
+        ]);
+
         while ($arStatus = $obStatuses->fetch()) {
-            $bitrixPaymentStatusesList[$arStatus['ID']] = array(
-                'ID'   => $arStatus['ID'],
-                'NAME' => $arStatus['NAME'],
-            );
+            $bitrixPaymentStatusesList[$arStatus['ID']] = ['ID'   => $arStatus['ID'], 'NAME' => $arStatus['NAME']];
         }
 
         return $bitrixPaymentStatusesList;
@@ -143,11 +133,9 @@ class RCrmActions
 
     public static function OrderPropsList()
     {
-        $bitrixPropsList = array();
-        $arPropsAll = OrderPropsTable::getList(array(
-            'select' => array('*'),
-            'filter' => array('CODE' => '_%')
-        ));
+        $bitrixPropsList = [];
+        $arPropsAll = OrderPropsTable::getList(['select' => ['*'], 'filter' => ['CODE' => '_%']]);
+
         while ($prop = $arPropsAll->Fetch()) {
             $bitrixPropsList[$prop['PERSON_TYPE_ID']][] = $prop;
         }
@@ -157,14 +145,8 @@ class RCrmActions
 
     public static function PricesExportList()
     {
-        $catalogExportPrices = array();
-        $dbPriceType = CCatalogGroup::GetList(
-            array(),
-            array(),
-            false,
-            false,
-            array('ID', 'NAME', 'NAME_LANG')
-        );
+        $catalogExportPrices = [];
+        $dbPriceType = CCatalogGroup::GetList([], [], false, false, ['ID', 'NAME', 'NAME_LANG']);
 
         while ($arPriceType = $dbPriceType->Fetch())
         {
@@ -176,8 +158,9 @@ class RCrmActions
 
     public static function StoresExportList()
     {
-        $catalogExportStores = array();
-        $dbStores = CCatalogStore::GetList(array(), array('ACTIVE' => 'Y'), false, false, array('ID', 'TITLE'));
+        $catalogExportStores = [];
+        $dbStores = CCatalogStore::GetList([], ['ACTIVE' => 'Y'], false, false, ['ID', 'TITLE']);
+
         while ($stores = $dbStores->Fetch()) {
             $catalogExportStores[] = $stores;
         }
@@ -187,18 +170,19 @@ class RCrmActions
 
     public static function IblocksExportList()
     {
-        $catalogExportIblocks = array();
-        $dbIblocks = CIBlock::GetList(array('IBLOCK_TYPE' => 'ASC', 'NAME' => 'ASC'), array('CHECK_PERMISSIONS' => 'Y', 'MIN_PERMISSION' => 'W'));
+        $catalogExportIblocks = [];
+        $dbIblocks = CIBlock::GetList(['IBLOCK_TYPE' => 'ASC', 'NAME' => 'ASC'], ['CHECK_PERMISSIONS' => 'Y', 'MIN_PERMISSION' => 'W']);
+
         while ($iblock = $dbIblocks->Fetch()) {
             if ($arCatalog = CCatalog::GetByIDExt($iblock['ID'])) {
                 if($arCatalog['CATALOG_TYPE'] == 'D' || $arCatalog['CATALOG_TYPE'] == 'X' || $arCatalog['CATALOG_TYPE'] == 'P') {
-                    $catalogExportIblocks[$iblock['ID']] = array(
+                    $catalogExportIblocks[$iblock['ID']] = [
                         'ID' => $iblock['ID'],
                         'IBLOCK_TYPE_ID' => $iblock['IBLOCK_TYPE_ID'],
                         'LID' => $iblock['LID'],
                         'CODE' => $iblock['CODE'],
                         'NAME' => $iblock['NAME'],
-                    );
+                    ];
 
                     if ($arCatalog['CATALOG_TYPE'] == 'X' || $arCatalog['CATALOG_TYPE'] == 'P') {
                         $iblockOffer = CCatalogSKU::GetInfoByProductIBlock($iblock['ID']);
@@ -289,8 +273,9 @@ class RCrmActions
      */
     public static function clearArr(array $arr): array
     {
-        /** @var \Intaro\RetailCrm\Service\Utils $utils */
-        $utils = ServiceLocator::getOrCreate(\Intaro\RetailCrm\Service\Utils::class);
+        /** @var Utils $utils */
+        $utils = ServiceLocator::getOrCreate(Utils::class);
+
         return $utils->clearArray($arr);
     }
 
@@ -302,8 +287,9 @@ class RCrmActions
      */
     public static function toJSON($str)
     {
-        /** @var \Intaro\RetailCrm\Service\Utils $utils */
-        $utils = ServiceLocator::getOrCreate(\Intaro\RetailCrm\Service\Utils::class);
+        /** @var Utils $utils */
+        $utils = ServiceLocator::getOrCreate(Utils::class);
+
         return $utils->toUTF8($str);
     }
 
@@ -319,8 +305,8 @@ class RCrmActions
             return ''; 
         }
 
-        /** @var \Intaro\RetailCrm\Service\Utils $utils */
-        $utils = ServiceLocator::getOrCreate(\Intaro\RetailCrm\Service\Utils::class);
+        /** @var Utils $utils */
+        $utils = ServiceLocator::getOrCreate(Utils::class);
 
         return $utils->fromUTF8($str);
     }
@@ -523,14 +509,14 @@ class RCrmActions
             case 'cartClear':
                 return self::proxy($api, $methodApi, $method, [$params, $site]);
             default:
-            return self::proxy($api, $methodApi, $method, array($params, $site));
+            return self::proxy($api, $methodApi, $method, [$params, $site]);
         }
     }
 
     private static function proxy($api, $methodApi, $method, $params) {
         $version = COption::GetOptionString(self::$MODULE_ID, self::$CRM_API_VERSION, 0);
         try {
-            $result = call_user_func_array(array($api, $methodApi), $params);
+            $result = call_user_func_array([$api, $methodApi], $params);
 
             if (!$result) {
                 $err = new RuntimeException(
@@ -551,21 +537,21 @@ class RCrmActions
                     || $methodApi == 'customersGet'
                     || $methodApi == 'customersCorporateGet'
                 ) {
-                    Logger::getInstance()->write(array(
+                    Logger::getInstance()->write([
                         'api' => $version,
                         'methodApi' => $methodApi,
                         'errorMsg' => !empty($result['errorMsg']) ? $result['errorMsg'] : '',
                         'errors' => !empty($result['errors']) ? $result['errors'] : '',
                         'params' => $params
-                    ), 'apiErrors');
+                    ], 'apiErrors');
                 } elseif ($methodApi == 'customersUpload' || $methodApi == 'ordersUpload') {
-                    Logger::getInstance()->write(array(
+                    Logger::getInstance()->write([
                         'api' => $version,
                         'methodApi' => $methodApi,
                         'errorMsg' => !empty($result['errorMsg']) ? $result['errorMsg'] : '',
                         'errors' => !empty($result['errors']) ? $result['errors'] : '',
                         'params' => $params
-                    ), 'uploadApiErrors');
+                    ], 'uploadApiErrors');
                 } elseif ($methodApi == 'cartGet') {
                     Logger::getInstance()->write(
                         [
@@ -584,13 +570,13 @@ class RCrmActions
                         !empty($result['errorMsg']) ? $result['errorMsg'] : ''
                     );
 
-                    Logger::getInstance()->write(array(
+                    Logger::getInstance()->write([
                         'api' => $version,
                         'methodApi' => $methodApi,
                         'errorMsg' => !empty($result['errorMsg']) ? $result['errorMsg'] : '',
                         'errors' => !empty($result['errors']) ? $result['errors'] : '',
                         'params' => $params,
-                    ), 'apiErrors');
+                    ], 'apiErrors');
                 }
 
                 if (function_exists('retailCrmApiResult')) {
@@ -671,13 +657,13 @@ class RCrmActions
             $exception->getCode() . ': ' . $exception->getMessage()
         );
 
-        Logger::getInstance()->write(array(
+        Logger::getInstance()->write([
             'api' => $version,
             'methodApi' => $methodApi,
             'errorMsg' => $exception->getMessage(),
             'errors' => $exception->getCode(),
             'params' => $params
-        ), 'apiErrors');
+        ], 'apiErrors');
 
         if (function_exists('retailCrmApiResult')) {
             retailCrmApiResult($methodApi, false, $apiResultExceptionName);
diff --git a/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php b/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php
index 8ca952f2..6c6298fe 100644
--- a/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php
+++ b/intaro.retailcrm/classes/general/history/RetailCrmHistory_v5.php
@@ -51,7 +51,6 @@ class RetailCrmHistory
     public static $CRM_DISCOUNT_ROUND = 'discount_round';
 
     const PAGE_LIMIT = 25;
-    const CANCEL_PROPERTY_CODE = 'INTAROCRM_IS_CANCELED';
 
     public static function customerHistory()
     {
diff --git a/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php b/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php
index 5292c5f3..9a1f95f7 100644
--- a/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php
+++ b/intaro.retailcrm/classes/general/order/RetailCrmOrder_v5.php
@@ -431,11 +431,11 @@ class RetailCrmOrder
         $arUser = UserTable::getById($arOrder['USER_ID'])->fetch();
         $fioCrm = [$order['firstName'] ?? null, $order['lastName'] ?? null, $order['patronymic'] ?? null];
 
-        if (in_array($arUser['NAME'], $fioCrm)) {
+        if ($arUser['NAME'] !== '' && in_array($arUser['NAME'], $fioCrm)) {
             $order['firstName'] = $arUser['NAME'];
         }
 
-        if (in_array($arUser['LAST_NAME'], $fioCrm)) {
+        if ($arUser['LAST_NAME'] !== '' && in_array($arUser['LAST_NAME'], $fioCrm)) {
             $order['lastName'] = $arUser['LAST_NAME'];
         }
 
diff --git a/intaro.retailcrm/description.ru b/intaro.retailcrm/description.ru
index 079bda7c..da60ca69 100644
--- a/intaro.retailcrm/description.ru
+++ b/intaro.retailcrm/description.ru
@@ -1 +1 @@
-- Исправлена ошибка при передаче подписки на рекламно-информационные рассылки
+- Исправлена критическая ошибка при переходе в настройки модуля
diff --git a/intaro.retailcrm/install/index.php b/intaro.retailcrm/install/index.php
index a728841d..f37afa67 100644
--- a/intaro.retailcrm/install/index.php
+++ b/intaro.retailcrm/install/index.php
@@ -15,6 +15,7 @@ use Bitrix\Sale\EventActions;
 use Bitrix\Sale\Internals\OrderTable;
 use Intaro\RetailCrm\Component\ConfigProvider;
 use Intaro\RetailCrm\Component\Installer\InstallerTrait;
+use Intaro\RetailCrm\Service\CurrencyService;
 use Intaro\RetailCrm\Service\OrderLoyaltyDataService;
 use Intaro\RetailCrm\Vendor\Symfony\Component\Process\PhpExecutableFinder;
 use RetailCrm\ApiClient;
@@ -242,6 +243,7 @@ class intaro_retailcrm extends CModule
         include($this->INSTALL_PATH . '/../lib/component/constants.php');
         include($this->INSTALL_PATH . '/../lib/repository/agreementrepository.php');
         include($this->INSTALL_PATH . '/../lib/service/orderloyaltydataservice.php');
+        include($this->INSTALL_PATH . '/../lib/service/currencyservice.php');
         include($this->INSTALL_PATH . '/../lib/component/factory/clientfactory.php');
         include($this->INSTALL_PATH . '/../lib/component/apiclient/clientadapter.php');
 
@@ -311,9 +313,11 @@ class intaro_retailcrm extends CModule
 
             // form correct url
             $api_host = parse_url($api_host);
+
             if ($api_host['scheme'] !== 'https') {
                 $api_host['scheme'] = 'https';
             }
+
             $api_host = $api_host['scheme'] . '://' . $api_host['host'];
 
             if (!$api_host || !$api_key) {
@@ -374,15 +378,14 @@ class intaro_retailcrm extends CModule
                 $api_key = COption::GetOptionString($this->MODULE_ID, $this->CRM_API_KEY_OPTION, 0);
 
                 foreach ($arResult['arSites'] as $site) {
+                    $siteCode[$site['LID']] = null;
+
                     if ($_POST['sites-id-' . $site['LID']] && !empty($_POST['sites-id-' . $site['LID']])) {
                         $siteCode[$site['LID']] = htmlspecialchars(trim($_POST['sites-id-' . $site['LID']]));
-                    } else {
-                        $siteCode[$site['LID']] = null;
                     }
                 }
 
                 $arResult['arCurrencySites'] = RCrmActions::getCurrencySites();
-                $bitrixBaseCurrency = CCurrency::GetBaseCurrency();
                 $result = $this->getReferenceShops($api_host, $api_key);
 
                 if (isset($result['errCode'])) {
@@ -392,26 +395,18 @@ class intaro_retailcrm extends CModule
                 }
 
                 foreach ($arResult['arSites'] as $bitrixSite) {
-                    $currentCurrency = $bitrixBaseCurrency;
-                    $LID = $bitrixSite['LID'];
+                    $LID = $bitrixSite['LID'] ?? null;
+                    $cmsCurrency = $arResult['arCurrencySites'][$LID] ?? null;
+                    $crmCurrency = $arResult['sitesList'][$siteCode[$LID]]['currency'] ?? null;
 
-                    if (isset($arResult['arCurrencySites'][$LID])) {
-                        $currentCurrency = $arResult['arCurrencySites'][$LID];
-                    }
-
-                    if (
-                        isset($arResult['sitesList'][$siteCode[$LID]])
-                        && $currentCurrency !== $arResult['sitesList'][$siteCode[$LID]]['currency'])
-                    {
-                        $arResult['errCode'] = 'ERR_CURRENCY_SITES';
-                    }
+                    $arResult['errCode'] = CurrencyService::validateCurrency($cmsCurrency, $crmCurrency);
                 }
 
                 if (count($arResult['arSites']) != count($siteCode)) {
                     $arResult['errCode'] = 'ERR_FIELDS_API_HOST';
                 }
 
-                if (isset($arResult['errCode'])) {
+                if (!empty($arResult['errCode'])) {
                     $APPLICATION->IncludeAdminFile(
                         GetMessage('MODULE_INSTALL_TITLE'), $this->INSTALL_PATH . '/step11.php'
                     );
@@ -1458,11 +1453,11 @@ class intaro_retailcrm extends CModule
         global $APPLICATION;
 
         $client = new Client($api_host . '/api/'.self::V5, ['apiKey' => $api_key]);
+        $result = [];
 
         try {
-            $result = $client->makeRequest('/reference/sites', 'GET');
+            $siteResponse = $client->makeRequest('/reference/sites', 'GET');
             $bitrixSites = RCrmActions::getSitesList();
-            $bitrixBaseCurrency = CCurrency::GetBaseCurrency();
             $currencySites = RCrmActions::getCurrencySites();
         } catch (CurlException $e) {
             RCrmActions::eventLog(
@@ -1470,47 +1465,44 @@ class intaro_retailcrm extends CModule
                 $e->getCode() . ': ' . $e->getMessage()
             );
 
-            $res['errCode'] = 'ERR_' . $e->getCode();
+            $result['errCode'] = 'ERR_' . $e->getCode();
 
-            return $res;
+            return $result;
         }
 
-        //Проверка, что был получен корректный ответ
-        if (isset($result) && $result->getStatusCode() == 200) {
-            //Проверка количества магазинов, доступных по апи
-            if (count($bitrixSites) === 1 && count($result->sites) > 1) {
-                $res['errCode'] = 'ERR_COUNT_SITES';
+        // Проверка, что был получен корректный ответ
+        if (isset($siteResponse) && $siteResponse->getStatusCode() === 200) {
+            $sites = $siteResponse->sites ?? null;
+
+            if ($sites === null) {
+                $result['errCode'] = 'UNKNOWN_ERROR';
             }
 
-            if (!isset($res['errCode']) && count($bitrixSites) === 1 ) {
-                $currentCurrency = $bitrixBaseCurrency;
-                $LID = $bitrixSites[0]['LID'];
-
-                if (isset($currencySites[$LID])) {
-                    $currentCurrency = $currencySites[$LID];
-                }
-
-                $crmSite = reset($result->sites);
-
-                if ($currentCurrency !== $crmSite['currency']) {
-                    $res['errCode'] = 'ERR_CURRENCY_SITES';
-                }
+            //Проверка количества магазинов, доступных по API
+            if (count($bitrixSites) === 1 && count($sites) > 1) {
+                $result['errCode'] = 'ERR_COUNT_SITES';
             }
 
-            if (!isset($res)) {
+            if (!isset($result['errCode']) && count($bitrixSites) === 1 ) {
+                $LID = $bitrixSites[0]['LID'] ?? null;
+                $cmsCurrency = $currencySites[$LID] ?? null;
+
+                $crmSiteData = reset($sites);
+                $crmCurrency = $crmSiteData['currency'] ?? null;
+
+                $result['errCode'] = CurrencyService::validateCurrency($cmsCurrency, $crmCurrency);
+            }
+
+            if (empty($result['errCode'])) {
                 ConfigProvider::setApiVersion(self::V5);
 
-                $res['sitesList'] = $APPLICATION->ConvertCharsetArray(
-                    $result->sites,
-                    'utf-8',
-                    SITE_CHARSET
-                );
+                $result['sitesList'] = $APPLICATION->ConvertCharsetArray($sites, 'utf-8', SITE_CHARSET);
             }
         } else {
-            $res['errCode'] = 'ERR_METHOD_NOT_FOUND';
+            $result['errCode'] = 'ERR_METHOD_NOT_FOUND';
         }
 
-        return $res;
+        return $result;
     }
 
     /**
diff --git a/intaro.retailcrm/install/version.php b/intaro.retailcrm/install/version.php
index 4db47efb..984a8cae 100644
--- a/intaro.retailcrm/install/version.php
+++ b/intaro.retailcrm/install/version.php
@@ -1,6 +1,6 @@
 <?php
 
 $arModuleVersion = [
-    'VERSION'      => '6.4.11',
-    'VERSION_DATE' => '2023-12-08 13:00:00'
+    'VERSION'      => '6.4.12',
+    'VERSION_DATE' => '2023-12-12 17:00:00'
 ];
diff --git a/intaro.retailcrm/lang/en/install/index.php b/intaro.retailcrm/lang/en/install/index.php
index a1414f85..f9b50076 100644
--- a/intaro.retailcrm/lang/en/install/index.php
+++ b/intaro.retailcrm/lang/en/install/index.php
@@ -17,3 +17,4 @@ $MESS ['ERR_ARTICLE_IBLOCK'] = 'Articles are not set';
 $MESS ['DATE_TIMEZONE_ERR'] = 'Timezone is not specified in php settings.';
 $MESS ['SALE_VERSION_ERR'] = '\'Online-store\' module version must be higher than 16.';
 $MESS['UF_SUBSCRIBE_USER_EMAIL_TITLE'] = 'Agree to receive promotional newsletters';
+$MESS ['CRM_SITES_ERROR'] = 'Failed to get list of CRM stores, please try another API key or contact RetailCRM support.';
diff --git a/intaro.retailcrm/lang/en/install/step1.php b/intaro.retailcrm/lang/en/install/step1.php
index 6f4fd825..296cbc53 100644
--- a/intaro.retailcrm/lang/en/install/step1.php
+++ b/intaro.retailcrm/lang/en/install/step1.php
@@ -19,3 +19,5 @@ $MESS ['ERR_COUNT_SITES'] = 'The API Key you entered relates to more than one st
 Change the access settings for the API key, it should work with only one store in CRM';
 $MESS ['ERR_CURRENCY_SITES'] = 'The currency of the site differs from the currency of the store in CRM.
 For the integration to work correctly, the currencies in CRM and CMS must match';
+$MESS ['ERR_CMS_CURRENCY'] = 'Failed to get Bitrix site currency';
+$MESS ['ERR_CRM_CURRENCY'] = 'Failed to get CRM store currency';
diff --git a/intaro.retailcrm/lang/en/install/step11.php b/intaro.retailcrm/lang/en/install/step11.php
index df60160e..cdfaec77 100644
--- a/intaro.retailcrm/lang/en/install/step11.php
+++ b/intaro.retailcrm/lang/en/install/step11.php
@@ -12,3 +12,5 @@ $MESS ['INFO_1'] = 'Set the correspondence between 1C-Bitrix and RetailCRM store
 $MESS ['INFO_2'] = 'All your stores in RetailCRM must have a common API key!';
 $MESS ['ERR_CURRENCY_SITES'] = 'The currency of the site differs from the currency of the store in CRM.
 For the integration to work correctly, the currencies in CRM and CMS must match';
+$MESS ['ERR_CMS_CURRENCY'] = 'Failed to get Bitrix site currency';
+$MESS ['ERR_CRM_CURRENCY'] = 'Failed to get CRM store currency';
diff --git a/intaro.retailcrm/lang/en/options.php b/intaro.retailcrm/lang/en/options.php
index 3206b0dd..f9163d76 100644
--- a/intaro.retailcrm/lang/en/options.php
+++ b/intaro.retailcrm/lang/en/options.php
@@ -105,7 +105,10 @@ $MESS ['INTEGRATIONS'] = ' (integration)';
 $MESS ['ERR_COUNT_SITES'] = 'The API Key you entered relates to more than one store.
 Change the access settings for the API key, it should work with only one store in CRM';
 $MESS ['ERR_CURRENCY_SITES'] = 'The currency of the site differs from the currency of the store in CRM.
-For the integration to work correctly, the currencies in CRM and CMS must match';
+For the integration to work correctly, the currencies in CRM and CMS must match #NAME#';
+$MESS ['ERR_CMS_CURRENCY'] = 'Failed to get Bitrix site currency';
+$MESS ['ERR_CRM_CURRENCY'] = 'Failed to get CRM store currency';
+$MESS ['CRM_STORE'] = 'CRM store: ';
 
 $MESS ['ACTIVITY_SETTINGS'] = 'Module activity settings';
 $MESS ['DEACTIVATE_MODULE'] = 'Deactivate the module';
diff --git a/intaro.retailcrm/lang/ru/install/index.php b/intaro.retailcrm/lang/ru/install/index.php
index 63c66930..ff079619 100644
--- a/intaro.retailcrm/lang/ru/install/index.php
+++ b/intaro.retailcrm/lang/ru/install/index.php
@@ -16,6 +16,7 @@ $MESS ['DATE_TIMEZONE_ERR'] = 'Не указана временная зона 
 $MESS ['SALE_VERSION_ERR'] = 'Версия модуля \'Интернет-магазин\' должна быть выше 16.';
 $MESS ['AGREEMENT_LOYALTY_PROGRAM_TEXT'] = 'Вставить текст Правил программы лояльности';
 $MESS ['AGREEMENT_PERSONAL_DATA_TEXT'] = 'Вставить текст соглашения на обработку персональных данных';
+$MESS ['CRM_SITES_ERROR'] = 'Не удалось получить список магазинов CRM, попробуйте другой ключ API или обратитесь в службу поддержки RetailCRM.';
 
 $MESS ['RETAIL_MODULE_NAME']              = 'RetailCRM';
 $MESS ['MODULE_DESCRIPTION']              = 'Модуль интеграции с RetailCRM - специализированной CRM для e-commerce';
diff --git a/intaro.retailcrm/lang/ru/install/step1.php b/intaro.retailcrm/lang/ru/install/step1.php
index 7d53f532..c7256822 100644
--- a/intaro.retailcrm/lang/ru/install/step1.php
+++ b/intaro.retailcrm/lang/ru/install/step1.php
@@ -15,7 +15,8 @@ $MESS ['ERR_COUNT_SITES'] = 'Введенный вами API Ключ относ
 Измените настройки доступа для API ключа, он должен работать только с одним магазином в CRM';
 $MESS ['ERR_CURRENCY_SITES'] = 'Валюта сайта отличается от валюты магазина в CRM.
 Для корректной работы интеграции, валюты в CRM и CMS должны совпадать';
-//$MESS ['URL_NOT_FOUND'] = 'В настройках одного или нескольких сайтов не заполнено поле "URL сервера".';
+$MESS ['ERR_CMS_CURRENCY'] = 'Не удалось получить валюту сайта Bitrix';
+$MESS ['ERR_CRM_CURRENCY'] = 'Не удалось получить валюту магазина CRM';
 $MESS ['INFO_1'] = 'Введите адрес экземпляра RetailCRM (например, https://demo.retailcrm.ru) и API-ключ.';
 $MESS ['INFO_2'] = 'API-ключ можно сгенерировать при регистрации магазина в RetailCRM (Администрирование > Интеграция).';
 $MESS ['INFO_3'] = 'Код сайта в 1С-Битрикс должен совпадать с кодом сайта в RetailCRM (Администрирование > Магазины).';
diff --git a/intaro.retailcrm/lang/ru/install/step11.php b/intaro.retailcrm/lang/ru/install/step11.php
index 81ca7627..67d296cf 100644
--- a/intaro.retailcrm/lang/ru/install/step11.php
+++ b/intaro.retailcrm/lang/ru/install/step11.php
@@ -11,4 +11,6 @@ $MESS ['ERR_FIELDS_API_HOST'] = 'Неверно заполнены поля.';
 $MESS ['INFO_1'] = 'Задайте соответствия между Вашими магазинами в 1С-Битрикс и RetailCRM.';
 $MESS ['INFO_2'] = 'У всех Ваших магазинов в RetailCRM должен быть общий API-ключ!';
 $MESS ['ERR_CURRENCY_SITES'] = 'Валюта сайта отличается от валюты магазина в CRM.
-Для корректной работы интеграции, валюты в CRM и CMS должны совпадать';
\ No newline at end of file
+Для корректной работы интеграции, валюты в CRM и CMS должны совпадать';
+$MESS ['ERR_CMS_CURRENCY'] = 'Не удалось получить валюту сайта Bitrix';
+$MESS ['ERR_CRM_CURRENCY'] = 'Не удалось получить валюту магазина CRM';
diff --git a/intaro.retailcrm/lang/ru/options.php b/intaro.retailcrm/lang/ru/options.php
index 7aa480ca..67751e59 100644
--- a/intaro.retailcrm/lang/ru/options.php
+++ b/intaro.retailcrm/lang/ru/options.php
@@ -31,6 +31,9 @@ $MESS ['ERR_COUNT_SITES'] = 'Введенный вами API Ключ относ
 Измените настройки доступа для API ключа, он должен работать только с одним магазином в CRM';
 $MESS ['ERR_CURRENCY_SITES'] = 'Валюта сайта отличается от валюты магазина в CRM.
 Для корректной работы интеграции, валюты в CRM и CMS должны совпадать';
+$MESS ['ERR_CMS_CURRENCY'] = 'Не удалось получить валюту сайта Bitrix';
+$MESS ['ERR_CRM_CURRENCY'] = 'Не удалось получить валюту магазина CRM';
+$MESS ['CRM_STORE'] = 'CRM магазин:  ';
 
 $MESS ['ICRM_OPTIONS_SUBMIT_TITLE'] = 'Сохранить настройки';
 $MESS ['ICRM_OPTIONS_SUBMIT_VALUE'] = 'Сохранить';
diff --git a/intaro.retailcrm/lib/component/constants.php b/intaro.retailcrm/lib/component/constants.php
index 2e23bb55..d4bfb74e 100644
--- a/intaro.retailcrm/lib/component/constants.php
+++ b/intaro.retailcrm/lib/component/constants.php
@@ -73,7 +73,6 @@ class Constants
     public const CRM_ORDER_HISTORY_DATE = 'order_history_date';
     public const CRM_CATALOG_BASE_PRICE = 'catalog_base_price';
     public const CRM_ORDER_DIMENSIONS = 'order_dimensions';
-    public const CANCEL_PROPERTY_CODE = 'INTAROCRM_IS_CANCELED';
     public const CRM_INTEGRATION_DELIVERY = 'integration_delivery';
     public const CRM_SHIPMENT_DEDUCTED        = 'shipment_deducted';
     public const CORPORATE_CONTRAGENT_TYPE    = 'legal-entity';
diff --git a/intaro.retailcrm/lib/service/currencyservice.php b/intaro.retailcrm/lib/service/currencyservice.php
new file mode 100644
index 00000000..0b906e23
--- /dev/null
+++ b/intaro.retailcrm/lib/service/currencyservice.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Intaro\RetailCrm\Service;
+
+
+class CurrencyService
+{
+    public static function validateCurrency($cmsCurrency, $crmCurrency): string
+    {
+        $errorCode = '';
+
+        if ($cmsCurrency === null) {
+            $errorCode = 'ERR_CMS_CURRENCY';
+        } elseif ($crmCurrency === null) {
+            $errorCode = 'ERR_CRM_CURRENCY';
+        } elseif ($cmsCurrency !== $crmCurrency) {
+            $errorCode = 'ERR_CURRENCY_SITES';
+        }
+
+        return $errorCode;
+    }
+}
diff --git a/intaro.retailcrm/options.php b/intaro.retailcrm/options.php
index d50df1da..f3fc958a 100644
--- a/intaro.retailcrm/options.php
+++ b/intaro.retailcrm/options.php
@@ -13,9 +13,10 @@ use Intaro\RetailCrm\Component\Constants;
 use Intaro\RetailCrm\Component\Handlers\EventsHandlers;
 use Intaro\RetailCrm\Repository\AgreementRepository;
 use Intaro\RetailCrm\Repository\TemplateRepository;
+use Intaro\RetailCrm\Service\CurrencyService;
 use Intaro\RetailCrm\Service\OrderLoyaltyDataService;
+use Intaro\RetailCrm\Service\Utils as RetailCrmUtils;
 use RetailCrm\Exception\CurlException;
-use \Intaro\RetailCrm\Service\Utils as RetailcrmUtils;
 
 IncludeModuleLangFile(__FILE__);
 $mid = 'intaro.retailcrm';
@@ -605,7 +606,7 @@ if (isset($_POST['Update']) && ($_POST['Update'] === 'Y')) {
 
     if (isset($_POST['loyalty_toggle']) && $_POST['loyalty_toggle'] === 'on') {
         try {
-            $hlName = RetailcrmUtils::getHlClassByName(Constants::HL_LOYALTY_CODE);
+            $hlName = RetailCrmUtils::getHlClassByName(Constants::HL_LOYALTY_CODE);
 
             if (empty($hlName)) {
                 OrderLoyaltyDataService::createLoyaltyHlBlock();
@@ -1066,10 +1067,12 @@ if (isset($_POST['Update']) && ($_POST['Update'] === 'Y')) {
 
     $version = COption::GetOptionString($mid, $CRM_API_VERSION, 0);
 
-    //currency
-    $baseCurrency = \Bitrix\Currency\CurrencyManager::getBaseCurrency();
-    $currencyOption = COption::GetOptionString($mid, $CRM_CURRENCY, 0) ?: $baseCurrency;
-    $currencyList = \Bitrix\Currency\CurrencyManager::getCurrencyList();
+
+    // Old functional
+    $currencyOption = COption::GetOptionString($mid, $CRM_CURRENCY, 0) ?: CCurrency::GetBaseCurrency();
+
+    //Validate currency
+    $currencyList = CurrencyManager::getCurrencyList();
 
     $errorsText = [];
 
@@ -1088,29 +1091,26 @@ if (isset($_POST['Update']) && ($_POST['Update'] === 'Y')) {
                     continue;
                 }
 
-                $currentCurrency = $baseCurrency;
+                $cmsCurrency = $arResult['arCurrencySites'][$LID] ?? null;
+                $crmCurrency = $arResult['sitesList'][$crmCode]['currency'] ?? null;
+                $crmSiteName = $arResult['sitesList'][$crmCode]['name'] ?? null;
 
-                if (isset($arResult['arCurrencySites'][$LID])) {
-                    $currentCurrency = $arResult['arCurrencySites'][$LID];
-                }
+                $errorCode = CurrencyService::validateCurrency($cmsCurrency, $crmCurrency);
 
-                if ($currentCurrency !== $arResult['sitesList'][$crmCode]['currency']) {
-                    $errorsText[] = GetMessage('ERR_CURRENCY_SITES') . ' (' . $arResult['sitesList'][$crmCode]['name'] . ')';
+                if ($errorCode === 'ERR_CMS_CURRENCY') {
+                    $errorsText[] = GetMessage($errorCode) . ' (' . $LID . ')';
+                } elseif($errorCode !== '') {
+                    $errorsText[] = GetMessage($errorCode) . ' (' . GetMessage('CRM_STORE') . $crmSiteName . ')';
                 }
             }
         } else {
-            $currentCurrency = $baseCurrency;
-            $LID = $arResult['arSites'][0]['LID'];
+            $LID = $arResult['arSites'][0]['LID'] ?? null;
+            $cmsCurrency = $arResult['arCurrencySites'][$LID] ?? null;
 
-            if (isset($arResult['arCurrencySites'][$LID])) {
-                $currentCurrency = $arResult['arCurrencySites'][$LID];
-            }
+            $crmSiteData = reset($arResult['sitesList']);
+            $crmCurrency = $crmSiteData['currency'] ?? null;
 
-            $crmSite = reset($arResult['sitesList']);
-
-            if ($currentCurrency !== $crmSite['currency']) {
-                $errorsText[] = GetMessage('ERR_CURRENCY_SITES') . ' (' . $crmSite['name'] . ')';
-            }
+            $errorsText[] = GetMessage(CurrencyService::validateCurrency($cmsCurrency, $crmCurrency));
         }
     }
 
diff --git a/tests/lib/service/CurrencyServiceTest.php b/tests/lib/service/CurrencyServiceTest.php
new file mode 100644
index 00000000..8bf0d402
--- /dev/null
+++ b/tests/lib/service/CurrencyServiceTest.php
@@ -0,0 +1,17 @@
+<?php
+
+use Intaro\RetailCrm\Service\CurrencyService;
+
+class CurrencyServiceTest extends BitrixTestCase
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+    }
+    public function testValidateCurrency()
+    {
+        self::assertNotEquals('', CurrencyService::validateCurrency('RUB', 'USD'));
+        self::assertNotEquals('', CurrencyService::validateCurrency('USD', 'RUB'));
+        self::assertEquals('', CurrencyService::validateCurrency('RUB', 'RUB'));
+    }
+}