Fatal error: Uncaught Error: Class "Symfony\Component\Templating\Helper\Helper" not found in /home/flighto/e-commerce/vendor/jms/serializer-bundle/Templating/SerializerHelper.php:17 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/jms/serializer-bundle/Templating/SerializerHelper.php on line 17