PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'a1nc25svvo4q56ic9opp7ochr5',
    'topics-session' => '1791594115.905.16940.353468|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '4744927b8e0b2fc96d8e50a907ffa678840616bb523ac29ad6714c55cde548baa:2:{i:0;s:5:"_csrf";i:1;s:32:"J2FHdCQPYBJDzEgxBJRfTSDZbSy0wxYg";}',
];