Fatal error: Uncaught Error: Class 'yii\web\AssetBundle' not found in /mnt/www/fss/service-center/vendor/yiisoft/yii2-gii/src/GiiAsset.php:18 Stack trace: #0 {main} thrown in /mnt/www/fss/service-center/vendor/yiisoft/yii2-gii/src/GiiAsset.php on line 18