PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => '9f754vm0k7571m2fbmncb2qbq3',
    'topics-session' => '1791383696.658.16482.782108|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '3cbe81080dd33f0d258e16b51570f451cf1e04d4b30d901d6bc346caed6b4de6a:2:{i:0;s:5:"_csrf";i:1;s:32:"1lUoeqHvy4Bij5xUdXM4ebJlU-jlMcEr";}',
];