Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventDispatcherInterface" not found in /home/lun45tyra31/public_html/demo/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:31 Stack trace: #0 {main} thrown in /home/lun45tyra31/public_html/demo/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php on line 31