Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /app/web/vendor/bizley/migration/tests/migrations/m180317_093600_create_table_test_columns.php:7 Stack trace: #0 {main} thrown in /app/web/vendor/bizley/migration/tests/migrations/m180317_093600_create_table_test_columns.php on line 7