Hi. What is the platform? What steps did you take to produce this error? What steps did you take to figure out the reason for the error? Did you look at system console output, process and Node error logs, or the browser error console? These can be quite helpful when investigating errors. The software you are running here is not even in alpha-release, so we do not expect it to be free of issues. Also I'm not really able to provide support at this time, but I can answer questions about the code itself if you manage to localize the issue and post a reproducible failure case.