PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'rfi32onntgba187cn3kuudvva7',
    '_csrf' => '9ec063dcd687ce027caa23152ded0fa8d11ddebb76ab24c86ba88daf35ff7498a:2:{i:0;s:5:"_csrf";i:1;s:32:"_wwQs7JPGS-D9_IxC9Hqf1M1B81pkSDZ";}',
    'topics-session' => '1791294995.941.17009.953191|d197bbbd1d400bd72372bc93068ad169',
];