Fatal error: Uncaught Error: Class 'yii\db\ColumnSchema' not found in /var/www/html/autocar/vendor/yiisoft/yii2/db/mysql/ColumnSchema.php:19 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/yiisoft/yii2/db/mysql/ColumnSchema.php on line 19