Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/dwtechco/public_html/vendor/zikula/extensions-module/Event/ExtensionListPreReSyncEvent.php:22 Stack trace: #0 {main} thrown in /home/dwtechco/public_html/vendor/zikula/extensions-module/Event/ExtensionListPreReSyncEvent.php on line 22