PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791192760.918.17008.115000|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '6l5rdufp81pebbbljsckm2jfv4',
    '_csrf' => 'd610e60a1b9bf2dcaff6fd34c39ade62b0b7a9ddf5eb896a769b01f7117bdeb6a:2:{i:0;s:5:"_csrf";i:1;s:32:"aAOsHJQraS0w2Y1lzZQ-0syNbHz9IZHj";}',
];