Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tzuovhm/tzuovhm/apps_/twofactor_backupcodes/lib/Migration/Version1002Date20170607104347.php:16 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/twofactor_backupcodes/lib/Migration/Version1002Date20170607104347.php on line 16