Fatal error: Uncaught Error: Class "OCA\Photos\Sabre\Album\AlbumRoot" not found in /var/www/html/nextcloud/apps/photos/lib/Sabre/Album/SharedAlbumRoot.php:20 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/photos/lib/Sabre/Album/SharedAlbumRoot.php on line 20