I was attempting to join DMU and got this message when i attempted to join 

I only have dalek mod in my list

Hey, the server is closed at the moment. Only the Staff team is on, because they're building a new spawn.
It's because we're releasing a new Dalek Mod update for 1.16.5 very soon! New planets and structures. 

I believe the world will also be reset due to all the new structures and systems. The staff has warned on the #dmu-news channel in the discord about this prior.
We hope to see you on the new server!  - Matt