Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/abertime/new.abertime.com.ua/vendor/dmstr/yii2-db/db/mysql/FileMigration.php:22 Stack trace: #0 {main} thrown in /home/abertime/new.abertime.com.ua/vendor/dmstr/yii2-db/db/mysql/FileMigration.php on line 22