PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => '14olv1ldmirjoaij7aa6ek9ms1',
    '_csrf' => 'f3dfc10781205d7c6e2da043ec180a7cde4c23e585fa0ed8689966a0195366eaa:2:{i:0;s:5:"_csrf";i:1;s:32:"hMPwqpR7p40-oBNNPQKY8hdx8sH7JYrs";}',
    'topics-session' => '1791050141.031.16975.507207|d197bbbd1d400bd72372bc93068ad169',
];