Fatal error: Uncaught Error: Class "yii\db\Migration" not found in /users/quirl/www/filemanager/spark/protected/runtime/module_backups/calendar_1736926955/migrations/m220217_141238_move_files.php:16 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/runtime/module_backups/calendar_1736926955/migrations/m220217_141238_move_files.php on line 16