Fatal error: Uncaught Error: Class "OCP\EventDispatcher\Event" not found in /home/tzuovhm/tzuovhm/apps_/richdocuments/lib/Events/BeforeFederationRedirectEvent.php:11 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/richdocuments/lib/Events/BeforeFederationRedirectEvent.php on line 11