2017-10-30 10:39:55 [::1][-][-][error][yii\base\InvalidConfigException] yii\base\InvalidConfigException: yii\web\Request::cookieValidationKey must be configured with a secret key. in C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\web\Request.php:1292 Stack trace: #0 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\web\Request.php(1274): yii\web\Request->loadCookies() #1 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\web\Request.php(1355): yii\web\Request->getCookies() #2 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\web\Request.php(1338): yii\web\Request->loadCsrfToken() #3 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\helpers\BaseHtml.php(302): yii\web\Request->getCsrfToken() #4 C:\xamppp\htdocs\eternity\views\layouts\main.php(21): yii\helpers\BaseHtml::csrfMetaTags() #5 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\base\View.php(330): require('C:\\xamppp\\htdoc...') #6 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\base\View.php(250): yii\base\View->renderPhpFile('C:\\xamppp\\htdoc...', Array) #7 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\base\Controller.php(396): yii\base\View->renderFile('C:\\xamppp\\htdoc...', Array, Object(app\controllers\SiteController)) #8 C:\xamppp\htdocs\eternity\vendor\yiisoft\yii2\base\Controller.php(382): yii\base\Controller->renderContent('