One of the jetty applications in my workplace, which runs on an Ubuntu Server, is unresponsive (users which are going to http://[PATH_TO_MY_APP]/ are waiting and waiting and after a long while they get error code 400.
I'm new at this subject and I'm not sure how to begin troubleshooting this error. I can say that I get this error from multiple computers in the network and they're all windows machines secured with up to date anti-virus software, etc.
I've tried cleaning cache and cookies on the client machines but it didn't solve the issue.