Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\GenericEvent" not found in /home/tremblinlu/MyNextCloud/nextcloud/lib/public/Collaboration/AutoComplete/AutoCompleteEvent.php:34 Stack trace: #0 {main} thrown in /home/tremblinlu/MyNextCloud/nextcloud/lib/public/Collaboration/AutoComplete/AutoCompleteEvent.php on line 34