PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791887520.075.16697.366783|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'kag616t4e9plkl9meimtek12t0',
    '_csrf' => 'a9e92efcab89a20ba5fdf69e9ebe0f9348e732594fe997620c59b74a4ea6ade1a:2:{i:0;s:5:"_csrf";i:1;s:32:"pklvgdIWzsVSOKubxdvfhM8lDlHbWc7T";}',
];