Fatal error: Uncaught Error: Class "Sabre\VObject\Property" not found in /home/tzuovhm/tzuovhm/3rdparty_/sabre/vobject/lib/Property/Boolean.php:19 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/3rdparty_/sabre/vobject/lib/Property/Boolean.php on line 19