Fatal error: Uncaught Error: Class "Sabre\DAV\Collection" not found in /home/byteshos/public_html/hrm.byteshosting.net/vendor/sabre/dav/lib/Sabre/DAVACL/AbstractPrincipalCollection.php:18 Stack trace: #0 {main} thrown in /home/byteshos/public_html/hrm.byteshosting.net/vendor/sabre/dav/lib/Sabre/DAVACL/AbstractPrincipalCollection.php on line 18