Fatal error: Uncaught Error: Class "Sabre\DAV\Collection" not found in /usr/home/wdzaizai2/domains/tc.wdz.ddns-ip.net/public_html/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php:22
Stack trace:
#0 {main}
  thrown in /usr/home/wdzaizai2/domains/tc.wdz.ddns-ip.net/public_html/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php on line 22