Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Messenger/MessengerEventSubscriber.php:10 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Messenger/MessengerEventSubscriber.php on line 10