并非所有操作都有效 (404)

有这样一个控制器：

<?php

namespace app\controllers;

use Yii;
use yii\filters\AccessControl;
use yii\web\Controller;
use yii\filters\VerbFilter;
use app\models\LoginForm;
use app\models\ContactForm;

class StockController extends Controller{
    public function behaviors(){
        return [
            'access' => [
                'class' => AccessControl::className(),
                'only' => ['logout'],
                'rules' => [
                    [
                        'actions' => ['index'],
                        'allow' => true,
                        'roles' => ['*'],
                    ],
                ],
            ],
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'logout' => ['post'],
                ],
            ],
        ];
    }

    public function actions(){
        return [
            'error' => [
                'class' => 'yii\web\ErrorAction',
            ],
            'captcha' => [
                'class' => 'yii\captcha\CaptchaAction',
                'fixedVerifyCode' => YII_ENV_TEST ? 'testme' : null,
            ],
        ];
    }

    public function actionIndex(){
        var_dump("index work");die();
        return $this->render('index');
    }

    public function actionGGList(){
        var_dump("list work");die();
        return $this->render('gglist');
    }
}

index 操作正常工作，但 gglist 抛出 404 错误：

聚苯乙烯

这在 GII 工作之后开始发生