PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '546fcf1e753f07468271b130edb16b70a6a512e80a4480323b6940dae3c2bda0a:2:{i:0;s:5:"_csrf";i:1;s:32:"wqNo9tx0T6Im4zPS5qpJ-14H0S_ch1jm";}',
    'PHPSESSID' => 'qpea8c0vfdd5g3j21b1tdildj1',
    'topics-session' => '1791348797.449.16974.620969|d197bbbd1d400bd72372bc93068ad169',
];