Fatal error: Uncaught Error: Class 'yii\debug\Panel' not found in C:\xampp\htdocs\web\yii\basic\vendor\yiisoft\yii2-debug\src\panels\DbPanel.php:26 Stack trace: #0 {main} thrown in C:\xampp\htdocs\web\yii\basic\vendor\yiisoft\yii2-debug\src\panels\DbPanel.php on line 26