PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'b15a1j7qc7ugmpcst8m9jrieb6',
    '_csrf' => '34876f20bacb530e8e7c1c1f5cb237c49c812b78b2b41070d59d7d40f592895ea:2:{i:0;s:5:"_csrf";i:1;s:32:"y464A1YcCYgzuWQ-ZZkG9kwHVrvkYYoJ";}',
    'topics-session' => '1791497511.406.16481.803217|d197bbbd1d400bd72372bc93068ad169',
];