PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791479471.352.16975.687786|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '87f8921fc296167b760ed0e965f7839d9751773d160f5f08f720babfd1a79bc5a:2:{i:0;s:5:"_csrf";i:1;s:32:"OpHju36u5XTW56Uo2xl8pstBfKtTrpbg";}',
    'PHPSESSID' => 'f955off5u40gf9b0ut7f2il3c2',
];