Fatal error: Uncaught Error: Class "Sabre\DAV\ServerPlugin" not found in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CalDAV\Schedule\Plugin.php:59 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CalDAV\Schedule\Plugin.php on line 59