PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791443867.505.16476.391561|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'ec9231fcbc6dcb6f6d8568aef14721d43467fe4ab59edf80a09de84b1529f9d8a:2:{i:0;s:5:"_csrf";i:1;s:32:"gvqiYNmn4cO5-I8D2QB8pF_L84uebkL9";}',
    'PHPSESSID' => 'g14is2vsdkbmksfm2piocqia32',
];