It's been answered on the forums and Discord a few times:
https://discord.gg/KNP5zkBHRQ
The short of it is the host for LBML did a major update on their end that messed up a lot of settings that will require a major rehaul or finding a new host to try to keep things a little more "update proof". That will take a lot of time and planning to make sure everything works right though, so it's not going to be a quick fix due to the potential time sink. Good news is that this doesn't affect anything in the LBML program itself, so it's only the website features that are down.
In the meantime, you basically get free Ghost Mode, so it's a good opportunity to try to find spots people don't know about yet before they can get rough ideas from the server maps and try to whittle down where they are. The maps will be back though.