GeyserMC can't find a connection to the server.

I have had the server for like 1 month now and everything worked fine. I know that there are a few problems right now cuz of the new site etc.

The problem is that Java can find a connection easily but GeyserMC doesn't. When I do a connection test it is unreachable and I also can't join.

I don't know if that's a known issue but I couldn't find anything about it.