PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791358493.437.16551.725614|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'ad48ffce50717488226466e50e296da93e1651f6398c92236a7c1f8212c711efa:2:{i:0;s:5:"_csrf";i:1;s:32:"Cpt277_Kd1rSf9ZerhpK6MfvmdRw7DCf";}',
    'PHPSESSID' => 'u9e8b476mloppb48s9010m4il7',
];