Hi all, thanks for your interest and sorry for the downtime! I'm in the board of the nonprofit hosting Dissemin. The sad situation is that there is currently no one working full time on maintaining Dissemin, so while we try to keep it running, the codebase has lots of problems that we don't have time to fix... Sorry about that, and in case you're interested in helping, there are many simple issues on the github repos
https://github.com/dissemin/dissemin for which we'd happily receive PRs.