Fatal error: Uncaught Error: Class "OCP\AppFramework\App" not found in /home/tzuovhm/tzuovhm/apps/survey_client/lib/AppInfo/Application.php:16 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps/survey_client/lib/AppInfo/Application.php on line 16