It seems that this was an issue a while back. From GitHub I can see that they changed main.jsp to main.css everywhere. I did a full code search and was unable to come up with a main.jsp file as noted by the error above. Please ensure you have a fresh environment with no other issues that may interfere with the bug. If you still experience this issue, please let me know how to reproduce the issue and we can re-visit it. If I cannot reproduce this issue, it cannot be fixed. Thanks!