PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791050232.485.16480.974525|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'quj21b8hnpqc5ekoifo7o92c87',
    '_csrf' => 'bb4c94ea6b26092f8a4048f410ef48944bca6321892bef5ee6b7ff8281c2eac6a:2:{i:0;s:5:"_csrf";i:1;s:32:"PdC7eW84JjnCfOPBm_n6ue8rdJIOA5Er";}',
];