PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'h8vv8e552s626m53788tcp82q5',
    '_csrf' => 'a04cc37102ddcdd5a018bb799e28435fcf47d9a619bc98fedd0339149f767740a:2:{i:0;s:5:"_csrf";i:1;s:32:"U4yt1nt81k0WtVdBvvDtJxErJgAxWxrP";}',
    'topics-session' => '1791919649.932.16958.544590|d197bbbd1d400bd72372bc93068ad169',
];