Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tzuovhm/tzuovhm/core/Migrations/Version22000Date20210216080825.php:19 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/core/Migrations/Version22000Date20210216080825.php on line 19