PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791270138.033.16477.33509|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'b951312aee3fc7de4451ccf9f883fadcac02d82cd553ae3094f711fb3d2a2da1a:2:{i:0;s:5:"_csrf";i:1;s:32:"T2EFRaTpwl3hnHDyHlr59BnrtOIPIIz3";}',
    'PHPSESSID' => 'd8c46irup1p1b52udqhrvr51a4',
];