Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\GenericEvent" not found in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Logging/Event.php:7 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/src/Logging/Event.php on line 7