Fatal error: Uncaught Error: Class "Symfony\Component\Templating\Helper\Helper" not found in C:\xampp\htdocs\bateriasec\vendor\jms\serializer-bundle\Templating\SerializerHelper.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bateriasec\vendor\jms\serializer-bundle\Templating\SerializerHelper.php on line 17