With Bungeecord and what I would assume is offline mode, this seems to be very buggy. For example, it says " does not exist" when the player is offline, and sometimes on the website it shows as if players don't exist. For example, it'll show a Steve/Alex skin and show no info about the player even though they have a skin and have been punished before. I'd imagine there's other UUID bugs as well.

If you're running in offline mode, ensure onlineMode is set to false in the ban manager config.

It is, but it still doesn't seem to be working. I can try again later.

What exactly do you mean, 'it's not working'? Please note that the offline support was made via a Pull Request. BM doesn't officially support offline mode servers.

Whenever I try to ban an offline user, it spits the message that the user doesn't exist at me.