Proxy server issue in IIS

Hi team,
I am working in using application,we are using WCF service,

I am not getting any application in Local development application but
when we are working in Prod server application,then i am getting the below application,

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request

Reason: Error reading from remote server

can any one guide for resolving the above exception