Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in /var/www/typo3/vendor/symfony/event-dispatcher/LegacyEventDispatcherProxy.php:25 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/symfony/event-dispatcher/LegacyEventDispatcherProxy.php on line 25