PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'fvrujsdoq83210ad051ql0vpf3',
    '_csrf' => '17e8e33f87b3386fb8a94ee5b2138261a890a4e421d17d2fa5b68c8129667532a:2:{i:0;s:5:"_csrf";i:1;s:32:"yFzKwnSF6yMV8lwfwczRPV_rfBgWW13S";}',
    'topics-session' => '1791471954.756.16479.1837|d197bbbd1d400bd72372bc93068ad169',
];