Fatal error: Uncaught Error: Class "Sabre\CalDAV\CalendarObject" not found in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CalDAV\Schedule\SchedulingObject.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CalDAV\Schedule\SchedulingObject.php on line 17