Fatal error: Uncaught Error: Class "OCA\Photos\Controller\PreviewController" not found in /home/tzuovhm/tzuovhm/apps_/photos/lib/Controller/PublicPreviewController.php:16 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/photos/lib/Controller/PublicPreviewController.php on line 16