Fatal error: Uncaught Error: Interface "Sabre\Xml\XmlSerializable" not found in /home/tzuovhm/tzuovhm/3rdparty_/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php:26 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/3rdparty_/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php on line 26