PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '26ea514252a95845728c5b7aaf7d50fb032c05c6a2adaf9a40f5c70b1f2cc1a9a:2:{i:0;s:5:"_csrf";i:1;s:32:"6ok7UHBye43w_1aLVVLs79liGYq-F7AZ";}',
    'PHPSESSID' => '83i59j9eflb9nbnntipb1jgj90',
    'topics-session' => '1791573298.303.16511.160096|d197bbbd1d400bd72372bc93068ad169',
];