Fatal error: Uncaught Error: Class "OCP\Migration\SimpleMigrationStep" not found in /home/tremblinlu/MyNextCloud/nextcloud/lib/public/Migration/BigIntMigration.php:32 Stack trace: #0 {main} thrown in /home/tremblinlu/MyNextCloud/nextcloud/lib/public/Migration/BigIntMigration.php on line 32