Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /var/www/html/autocar/vendor/yiisoft/yii2/log/migrations/m141106_185632_log_init.php:22 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/yiisoft/yii2/log/migrations/m141106_185632_log_init.php on line 22