Fatal error: Uncaught Error: Class "yii\base\Widget" not found in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-debug\src\widgets\NavigationButton.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-debug\src\widgets\NavigationButton.php on line 18