Fatal error: Uncaught Error: Class "Sabre\VObject\Document" not found in D:\xampp\htdocs\pimcore\my-project\vendor\sabre\vobject\lib\Component\VCalendar.php:23 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\sabre\vobject\lib\Component\VCalendar.php on line 23