PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '40831d41dfb294fde8f5454e545b56974a5404564b99ba5c85eb09657d1915e3a:2:{i:0;s:5:"_csrf";i:1;s:32:"MQh4_Ojvkrbz2qFnax3Q7mqAagQKVM6w";}',
    'topics-session' => '1791398323.203.16476.10244|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '5p0b9jcavg0194shuin9s8f9j5',
];