Proxy servlet failed to stream content

Setup, Configuration and Use Beginners
1

hello

since some days i get this message here:

2018-03-30 22:06:06.344 [WARN ] [.internal.proxy.BlockingProxyServlet] - Proxy servlet failed to stream content: java.net.NoRouteToHostException: No route to host

what is that and how can i solve it?

2

nobody?