“；模块”；组件必须包含一个“；类“；要素

我在yii2中定义了一个名为"admin"的模块。我已经在web.php配置文件中注册了这个模块。但当我试图访问这个时，我会遇到一个错误。

这是我的web.php

<?php
$params = require(__DIR__ . '/params.php');
$config = [
    'id' => 'basic',
    'basePath' => dirname(__DIR__),
    'language'=>'fa_ir',
    'bootstrap' => ['log'],
    'components' => [
        'request' => [
            // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
            'cookieValidationKey' => 'SiMhYyhP2MZ_BAi321KfDHFk5uleQFa9',
        ],
        'jdate' => [
            'class' => 'jDate'DateTime'
        ],
        'cache' => [
            'class' => 'yii'caching'FileCache',
        ],
        'user' => [
            'identityClass' => 'app'models'User',
            'enableAutoLogin' => true,
        ],
        'errorHandler' => [
            'errorAction' => 'site/error',
        ],
        'modules' => [
            'admin' => [
                'class' => 'app'modules'admin'Module',
            ],
        ],
        'mailer' => [
            'class' => 'yii'swiftmailer'Mailer',
            // send all mails to a file by default. You have to set
            // 'useFileTransport' to false and configure a transport
            // for the mailer to send real emails.
            'useFileTransport' => false,
            'transport' => [
                'class' => 'Swift_SmtpTransport',
                'host' => 'smtp.gmail.com',
                'username' => 'pishevaris@gmail.com',
                'password' => 'bhtk1368',
                'port' => '587',
                'encryption' => 'tls',
            ],
        ],
        'log' => [
            'traceLevel' => YII_DEBUG ? 3 : 0,
            'targets' => [
                [
                    'class' => 'yii'log'FileTarget',
                    'levels' => ['error', 'warning'],
                ],
            ],
        ],
        'urlManager' => [
            'class' => 'yii'web'UrlManager',
            // Disable index.php
            'showScriptName' => false,
            // Disable r= routes
            'enablePrettyUrl' => true,
            'rules' => array(
                '<controller:'w+>/<id:'d+>' => '<controller>/view',
                '<controller:'w+>/<action:'w+>/<id:'d+>' => '<controller>/<action>',
                '<controller:'w+>/<action:'w+>' => '<controller>/<action>',
            ),
        ],
        'db' => require(__DIR__ . '/db.php'),
    ],
    'params' => $params,
];
if (YII_ENV_DEV) {
    // configuration adjustments for 'dev' environment
    $config['bootstrap'][] = 'debug';
    $config['modules']['debug'] = [
        'class' => 'yii'debug'Module',
    ];
    $config['bootstrap'][] = 'gii';
    $config['modules']['gii'] = [
        'class' => 'yii'gii'Module',
    ];
}
return $config;

这是我的模块类：

<?php
namespace app'modules'admin;
class Module extends 'yii'base'Module
{
    public $controllerNamespace = 'app'modules'admin'controllers';
    public function init()
    {
        parent::init();
        // custom initialization code goes here
    }
}

但是当我尝试访问mysite/admin/default/index时，我会遇到The configuration for the "modules" component must contain a "class" element错误