Fatal error: Uncaught Error: Call to undefined function Symfony\Component\EventDispatcher\trigger_deprecation() in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/symfony/event-dispatcher/LegacyEventDispatcherProxy.php:16 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/symfony/event-dispatcher/LegacyEventDispatcherProxy.php on line 16