YII框架模块实现

Question

YII框架模块建好，配置也复制好，就是无法访问，目前崩溃中'modules' => [        'article' => [            'class' => 'app\modules\article\Article',        ],    ],复制到web.php $config中，一切都是照着敲的，不明白就是无法访问<?phpnamespace app\modules\article\controllers;use yii\web\Controller;class DefaultController extends Controller{    public function actionIndex()    {        //return $this->render('index');    }}Not Found (#404)Page not found.The above error occurred while the Web server was processing your request.Please contact us if you think this is a server error. Thank you.