add lang key

app/UI/Client/EmailAccount/Providers/AccountDataProvider.php

@@ -106,7 +106,7 @@ class AccountDataProvider extends BaseDataProvider
          */
         if(!$result)
         {
-            return (new HtmlDataJsonResponse())->setMessage($service->getError())->setStatusError();
+            return (new HtmlDataJsonResponse())->setMessageAndTranslate($service->getError())->setStatusError();
         }
 
         return (new HtmlDataJsonResponse())->setMessageAndTranslate('emailAccountHasBeenAdded')->setStatusSuccess();