Notice: Undefined variable: form in D:\phpStudy\WWW\Soeasy\vendor\yiisoft\yii2-gii\src\generators\model\form.php on line 9

Fatal error: Uncaught Error: Call to a member function field() on unknown in D:\phpStudy\WWW\Soeasy\vendor\yiisoft\yii2-gii\src\generators\model\form.php:9 Stack trace: #0 {main} thrown in D:\phpStudy\WWW\Soeasy\vendor\yiisoft\yii2-gii\src\generators\model\form.php on line 9