Fatal error: Uncaught Error: Class "Sabre\DAVACL\AbstractPrincipalCollection" not found in /var/www/html/nextcloud/apps/photos/lib/Sabre/PublicRootCollection.php:22 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/photos/lib/Sabre/PublicRootCollection.php on line 22