PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791738624.653.16974.560132|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '4m5mu7657e55tnvoqh77j08lq2',
    '_csrf' => 'fa30536f208ca66f48fa4b45eb155fc32b61b1066ca50f947f44bcee4fa6229ca:2:{i:0;s:5:"_csrf";i:1;s:32:"pgIHYA3hnBHz-_JoNa-lsuswIv2liTDy";}',
];