PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '702a163fd58fa2566c7bf33a36e0c047c6f0f4c1f00fd236490c6ef4e882e0aaa:2:{i:0;s:5:"_csrf";i:1;s:32:"R8nZ9gnPhODIyWfrM8d2Y6SBPyzg7gkV";}',
    'PHPSESSID' => 'bp3lmmtfqvjn1hhiffgs0dgg35',
    'topics-session' => '1791392442.028.16855.129805|d197bbbd1d400bd72372bc93068ad169',
];