PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'bvqssjqfi3vrpd0v68ao34ehv3',
    'topics-session' => '1792004801.938.16476.526069|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'e8602d7285998972c0ecd4e926341f02e357eb24baf18774d6fc3b75b1338cfaa:2:{i:0;s:5:"_csrf";i:1;s:32:"2sKHS_IW7x69LdcdB4aK2g8kfGBaNEl6";}',
];