PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'hs8pfrrf35dnr7hvo1bghv1qq3',
    'topics-session' => '1791243224.819.16478.181951|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '09c69a7f1f41d43aca1a15ea7b8573b138a908b13d54463890953c6591ce4639a:2:{i:0;s:5:"_csrf";i:1;s:32:"70bvc1W8MEtcf-hPdzXIUayIWj_hK2og";}',
];