Fatal error: Uncaught Error: Interface "Sabre\DAV\Sharing\ISharedNode" not found in /var/www/illumine/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php:14 Stack trace: #0 {main} thrown in /var/www/illumine/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php on line 14