PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => '4ni0496udjk8vl2sjvtedc7hj3',
    '_csrf' => '75ae9d0bc1e8902c37595b69d6c58143d5f59bde407574a9ca49dc8b5e182fc4a:2:{i:0;s:5:"_csrf";i:1;s:32:"afqVM2k3UuNPpj4LGy5BNOqEHZJIV0ge";}',
    'topics-session' => '1791177481.238.16480.282608|d197bbbd1d400bd72372bc93068ad169',
];