PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1765829439.47.15680.139922|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'h7hh7j2iuglk7i5ferd6180fl6',
    '_csrf' => 'f3f61a73ec25a31ef032b8a92e00038b47e74ff4a8a16dd8a16b5c6a1214c896a:2:{i:0;s:5:"_csrf";i:1;s:32:"6qc3cTOocqFiNMTCllWBYEbwlif_zPiZ";}',
];