Fatal error: Uncaught Error: Class 'yii\base\Widget' not found in C:\xampp\htdocs\aroflo-dataforce\vendor\yiisoft\yii2-bootstrap4\src\Widget.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\aroflo-dataforce\vendor\yiisoft\yii2-bootstrap4\src\Widget.php on line 16