Fatal error: Uncaught Error: Class "Sabre\DAV\ServerPlugin" not found in /var/www/html/nextcloud/apps/dav/lib/Provisioning/Apple/AppleProvisioningPlugin.php:18 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/dav/lib/Provisioning/Apple/AppleProvisioningPlugin.php on line 18