Fatal error: Uncaught Error: Class 'Sabre\DAV\Locks\Backend\AbstractTest' not found in /home/malert/WebDAV/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php:5 Stack trace: #0 {main} thrown in /home/malert/WebDAV/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php on line 5