diff --git a/Resources/views/layout.html.twig b/Resources/views/layout.html.twig
index 018bd18..2ab14af 100755
--- a/Resources/views/layout.html.twig
+++ b/Resources/views/layout.html.twig
@@ -396,7 +396,7 @@
                     {% else -%}
                     var endpoint = '{{ endpoint }}';
                     {% endif -%}
-                    {% if authentication.custom_endpoint %}
+                    {% if authentication and authentication.custom_endpoint %}
                     if ($('#api_endpoint') && typeof($('#api_endpoint').val()) != 'undefined') {
                         endpoint = $('#api_endpoint').val();
                     }