Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/dwtechco/public_html/vendor/zikula/core-bundle/Event/GenericEvent.php:25 Stack trace: #0 {main} thrown in /home/dwtechco/public_html/vendor/zikula/core-bundle/Event/GenericEvent.php on line 25