PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'bijgulg0e3hbk5dqu452i8mo17',
    'topics-session' => '1791443063.738.17009.101996|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '33e94862bcc59d43599e33c62d2d81f71788c25dad1eae1878c0f3409f77805aa:2:{i:0;s:5:"_csrf";i:1;s:32:"oYoVtm5qvFoae68Jz8NzoEAO4UwCvE3d";}',
];