Fatal error: Uncaught Error: Class "Sabre\DAV\Auth\Plugin" not found in /home/tzuovhm/tzuovhm/nextcloud/apps/dav/lib/CalDAV/Auth/PublicPrincipalPlugin.php:16 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/apps/dav/lib/CalDAV/Auth/PublicPrincipalPlugin.php on line 16