Notice: Undefined variable: generator in C:\xampp\htdocs\web\yii\basic\vendor\yiisoft\yii2-gii\src\generators\crud\default\views\index.php on line 9

Fatal error: Uncaught Error: Call to a member function generateUrlParams() on null in C:\xampp\htdocs\web\yii\basic\vendor\yiisoft\yii2-gii\src\generators\crud\default\views\index.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\web\yii\basic\vendor\yiisoft\yii2-gii\src\generators\crud\default\views\index.php on line 9