Notice: Undefined variable: generator in C:\xampp\htdocs\esales2\vendor\yiisoft\yii2-gii\src\generators\module\default\controller.php on line 12

Fatal error: Call to a member function getControllerNamespace() on null in C:\xampp\htdocs\esales2\vendor\yiisoft\yii2-gii\src\generators\module\default\controller.php on line 12