Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tzuovhm/tzuovhm/nextcloud/apps/text/lib/Migration/Version010000Date20190617184535.php:21 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/apps/text/lib/Migration/Version010000Date20190617184535.php on line 21