Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in /home/users/00/3c/21/home/www/vendor/symfony/event-dispatcher/ImmutableEventDispatcher.php:19 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/symfony/event-dispatcher/ImmutableEventDispatcher.php on line 19