PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791496519.208.17043.791987|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'aceb2b14132b5343ab0e3a4963f897cd50a8416435b83d1fb588a952a7396d90a:2:{i:0;s:5:"_csrf";i:1;s:32:"tkBHTAg6W3TCDDNyTcg-f7osyJV7iSWA";}',
    'PHPSESSID' => '3fm4l1ovat8625bt9qpt0mduo2',
];