Fatal error: Uncaught Error: Class "yii\web\Controller" not found in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-gii\src\controllers\DefaultController.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-gii\src\controllers\DefaultController.php on line 19