Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/http-kernel/EventListener/AbstractTestSessionListener.php:32
Stack trace:
#0 {main}
thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/http-kernel/EventListener/AbstractTestSessionListener.php on line 32