Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /home/eberhardschwarze/public_html/vendor/contao-community-alliance/events-contao-bindings/src/Subscribers/BackendSubscriber.php:35 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao-community-alliance/events-contao-bindings/src/Subscribers/BackendSubscriber.php on line 35