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