Fatal error: Uncaught Error: Interface 'Sabre\DAV\Locks\Backend\BackendInterface' not found in /home/mattiapa/cloud2.mprnl.fr/owncloud/apps/dav/lib/Files/FileLocksBackend.php:39 Stack trace: #0 {main} thrown in /home/mattiapa/cloud2.mprnl.fr/owncloud/apps/dav/lib/Files/FileLocksBackend.php on line 39