yii新增文件一直访问不到

在配置页面加上这些代码就可以访问成功了！
$config = [
    'components' => [
        'request' => [
            'cookieValidationKey' => 'qtOzGsjKeKfeRIQOWWxbePEe_Kie71Zt',
            'enableCookieValidation' => false,
            'enableCsrfValidation' => FALSE,
        ],
    ],
];