PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'frdgricq8svkiftgvouv2ttdo3',
    'topics-session' => '1791274773.28.16940.147693|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'eb6cc5267b54ba226501eeed3283c974310872d52b10ea4269aa1ef729225b40a:2:{i:0;s:5:"_csrf";i:1;s:32:"qkv7Bu9ZXHjUcBlrv1xQvd3qt4ZjJW9z";}',
];