PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791373051.369.16477.211579|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'h1mje33ms6r2auag88scv5teb0',
    '_csrf' => '4cb89c3d49a29878b7ad46d566236fc0ce923b2d17e4b1949388dcf9b1306434a:2:{i:0;s:5:"_csrf";i:1;s:32:"F9KLi4sUiSdA3YYf-21PvDDE8CfriciE";}',
];