PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1790865589.688.16551.260170|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'd45bcb4482025b486062e697ea03e216d27fadd645415bc463516871d02be529a:2:{i:0;s:5:"_csrf";i:1;s:32:"ExEWS5QB-GpQLJfa9brAPeS8k8deivDr";}',
];