Well, interesting response from Discord but also very reasonable, but I don't have the invites paused. A couple new members joined today. Here, I made this temporary invite link, try it out: https://discord.gg/zRdGNtBB
All good and sorry to hear that it still won't work. I had 5 people joining today, so it sadly has to be on your end. My research showed that your account may be restricted or limited and thus not be able to join. The Discord response might be just a generic error message. When you can't join other adult servers, that might be it.
You also might have been banned on the server if your account got hacked before?
Feel free to follow here or on Patreon / Subscribestar though, if Discord won't work! :)