Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/abertime/new.abertime.com.ua/vendor/pheme/yii2-settings/migrations/m151126_091910_add_unique_index.php:10 Stack trace: #0 {main} thrown in /home/abertime/new.abertime.com.ua/vendor/pheme/yii2-settings/migrations/m151126_091910_add_unique_index.php on line 10