Fatal error: Uncaught Error: Interface "Sabre\Xml\Element" not found in /home/ternalis/agenda/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php:22 Stack trace: #0 {main} thrown in /home/ternalis/agenda/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php on line 22