Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home/ntpcbgtpp/public_html/mat1/vendor/nelmio/security-bundle/src/EventListener/XssProtectionListener.php:23 Stack trace: #0 {main} thrown in /home/ntpcbgtpp/public_html/mat1/vendor/nelmio/security-bundle/src/EventListener/XssProtectionListener.php on line 23