Fatal error: Uncaught Error: Interface 'Symfony\Contracts\EventDispatcher\EventDispatcherInterface' not found in /var/www/typo3/vendor/typo3/symfony-psr-event-dispatcher-adapter/src/EventDispatcherAdapter.php:20 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/typo3/symfony-psr-event-dispatcher-adapter/src/EventDispatcherAdapter.php on line 20