In general, if you are seeing an "Internal Server Error" appear in your browser, that will mean that there is an exception in your logs. You might also find out more information by opening Chrome's Dev Tools, using the Network tab to inspect which XHR calls are being made and find out the one that is returning the error (it is usually the request in red).
The browser's console logs are also a good place to look.
support.atlassian.com might be able to help you resolve this issue sooner.
At a guess, if you are using GreenHopper 6.0.6 or higher, and you have enabled the Epics Support labs feature, it is possible that you are experiencing this bug: http://jira.atlassian.com/browse/GHS-6495
The Jira Software Cloud Team has been busy working on a simple, secure, and reliable way to integrate your build and deployment information from Jenkins with Jira Software Cloud. This means you don’t...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events