Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in /home/commyhos/public_html/drupaldistribution.com.myhost.id/dd10opignolms/vendor/symfony/event-dispatcher/GenericEvent.php:21 Stack trace: #0 {main} thrown in /home/commyhos/public_html/drupaldistribution.com.myhost.id/dd10opignolms/vendor/symfony/event-dispatcher/GenericEvent.php on line 21