Fatal error: Uncaught Error: Interface 'Sabre\Xml\Element' not found in /home/malert/WebDAV/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php:20 Stack trace: #0 {main} thrown in /home/malert/WebDAV/vendor/sabre/dav/lib/DAV/Xml/Request/PropPatch.php on line 20