Fatal error: Uncaught Error: Class "yii\db\Migration" not found in /var/www/html/prod/vendor/kartik-v/yii2-dynagrid/src/migrations/m140101_100000_dynagrid.php:19 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/kartik-v/yii2-dynagrid/src/migrations/m140101_100000_dynagrid.php on line 19