Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in /mnt/volume_lon1_01/backend/adminseppi/vendor/symfony/event-dispatcher/EventDispatcher.php:32 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/adminseppi/vendor/symfony/event-dispatcher/EventDispatcher.php on line 32