PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791594603.986.16479.783655|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '55afsjd19jb3l868mkcj98f7a4',
    '_csrf' => '029540dba5916094b74309349ced7052a01474c0aeb6038a141623d99646a6bba:2:{i:0;s:5:"_csrf";i:1;s:32:"g48FsGxnc1lT_XVoiFRzcR9X5BMmK-ZP";}',
];