Issue with Stream API

Developers API
1

We have the problem with Stream API. We send request to your server and get response from it:

    Zend_Http_Response Object
(
    [version:protected] => 1.1
    [code:protected] => 500
    [message:protected] => Internal Server Error
    [headers:protected] => Array
        (
            [Date] => Wed, 24 Oct 2018 08:24:57 GMT
            [Content-type] => text/plain; charset=utf-8
            [Content-length] => 37
            [Connection] => close
            [Set-cookie] => __cfduid=dcb33770503ce16499ea1f07eead8c8a51540369496; expires=Thu, 24-Oct-19 08:24:56 GMT; path=/; domain=.Cloudflare.com; HttpOnly
            [Cf-ray] => 46eb0cc9ed5d75ca-ARN
            [Expect-ct] => max-age=604800, report-uri="https://report-uri.Cloudflare.com/cdn-cgi/beacon/expect-ct"
            [Served-in-seconds] => 0.267
            [Strict-transport-security] => max-age=15780000; includeSubDomains
            [Tus-resumable] => 1.0.0
            [X-content-type-options] => nosniff
            [Vary] => Accept-Encoding
            [Server] => Cloudflare
        )

    [body:protected] => redis: all sentinels are unreachable

How to solve this problem? Yesterday, last work API is good.