Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/src/User/Group/LogSubscriber.php:17 Stack trace: #0 {main} thrown in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/src/User/Group/LogSubscriber.php on line 17