Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tzuovhm/tzuovhm/apps/files_sharing/lib/Migration/Version21000Date20201223143245.php:17 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps/files_sharing/lib/Migration/Version21000Date20201223143245.php on line 17