PHP Core Warning – yii\base\ErrorException

$_GET = [
    'redirect_url' => '/yjds2016/cases/match',
];

$_COOKIE = [
    'topics-session' => '1791002889.871.16480.738927|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'brr5e9c0dr03df1urr2njrr600',
    '_csrf' => 'a9f41dd85747f2051393e46013f844e195535b496554a09e4802774b74e00cf1a:2:{i:0;s:5:"_csrf";i:1;s:32:"Fn7jRj0GSLSZi9CkP9E_QrU9v720Z4YW";}',
];