PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1766055117.279.15686.241012|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'b4c375bf1e6fad6586ce404541162140998165c72434c221a68b99c7c29e4cf5a:2:{i:0;s:5:"_csrf";i:1;s:32:"ZHpw8ACjbMF9IcKTl-SaDhfzafmgDExh";}',
];