Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tzuovhm/tzuovhm/apps_/mail/lib/Migration/Version3500Date20231115184458.php:17 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/mail/lib/Migration/Version3500Date20231115184458.php on line 17