I see a proxy error on some of the UpRaise screens?

Many a time, JIRA server is set up in different infrastructural paradigms. One of the most common is use of proxy server as explained here -  https://confluence.atlassian.com/adminjiraserver072/integrating-jira-with-apache-828788156.html

Some of the screens in UpRaise that are resource intensive may take more time to load/process the request than others. In such cases if the proxy server timeout turns out to be less than the processing time 'a proxy error' is encountered. Read more here -  https://confluence.atlassian.com/jirakb/receive-an-error-reading-from-remote-server-644874989.html

This error is encountered typically on JIRA on-premise version.