Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tzuovhm/tzuovhm/apps_/twofactor_nextcloud_notification/lib/Migration/Version0001Date20180411172140.php:15 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/twofactor_nextcloud_notification/lib/Migration/Version0001Date20180411172140.php on line 15