Fatal error: Uncaught Error: Interface 'Symfony\Contracts\EventDispatcher\EventDispatcherInterface' not found in /var/www/typo3/vendor/symfony/event-dispatcher/EventDispatcherInterface.php:23
Stack trace:
#0 {main}
thrown in /var/www/typo3/vendor/symfony/event-dispatcher/EventDispatcherInterface.php on line 23