PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791187556.702.16476.217215|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'ef0f9puv21aa40kli0pmfmu2b4',
    '_csrf' => '295b9a0aeb2b82be8806578eb5bed11ce611bde01f53a7bb9c93b47d53695678a:2:{i:0;s:5:"_csrf";i:1;s:32:"Ul6NBnwJ5v0aLF0B2RITosSWZAxc5wI0";}',
];