Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\FilterControllerArgumentsEvent' not found in /home/devmecseminars/public_html/mec/vendor/symfony/http-kernel/Event/ControllerArgumentsEvent.php:28 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/http-kernel/Event/ControllerArgumentsEvent.php on line 28