PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'm9fsdev16rnm1snd7f9f5qo8l7',
    '_csrf' => 'fe6d47318814f91bfff69a10ba95b26ca2b5ae29e7eab3f733a55340bc8f7a7fa:2:{i:0;s:5:"_csrf";i:1;s:32:"H-du7gm0OOK7m_NBgDQYFCaA8Azm46lt";}',
    'topics-session' => '1791005052.148.16517.416476|d197bbbd1d400bd72372bc93068ad169',
];