PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '89ea1221c9a36811cbb8525e12d9974c52bde15d2c9a35ebaa1c6b8c888625f9a:2:{i:0;s:5:"_csrf";i:1;s:32:"nOeF1AFKvkADosrszKrWEaWPzp5nhOje";}',
    'topics-session' => '1791032915.204.16615.160825|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'fhjhm3ff5oismvbjpck96ejs43',
];