PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791253971.087.16517.745616|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'e3b379f3245f8a3700de130fcfb90e2fb691efa027aefd978eb622ae1940bb20a:2:{i:0;s:5:"_csrf";i:1;s:32:"igdarmvrx8Q2usnLypqyRAt7owJ4CgGp";}',
];