Chat Heads no longer works for me on my server. When I have a nickname on, even though I put it in the Name Aliases area as Himmel -> Takeru (my nickname and username respectively). It used to work perfectly before 1.21.10. Using Essentials nicknames.

Hm... With the 1.0 rewrite there could be a million reasons why it doesn't work.
Weird thing is that I specifically tested for EssentialsX nicknames.

I put it in the Name Aliases area as Himmel -> Takeru (my nickname and username respectively)

Can you try running /realname Himmel?
Chat Heads should automatically add the right Name Alias from that - see if that changes anything?

If that does not work, can you post a screenshot of a chat message and the tab player list? Maybe also what the /realname command says?

If your chat contains formatting (like different colors), make sure you're using the latest version 1.1.1, since that contained important fixes for that.

Other than that, not really sure.
I might need to build a debug version that logs all the important data, so we don't have to grasp at straws.

Yeah I tried that it didn't work and I am also on 1.1.1. I will do the steps you asked for.

So there is styling in the nickname - and in the rest of the message too. That's likely the culprit.

How do you set that nickname and general message styling?
Do you by chance have some EssentialsX settings or command I can copy paste?

If I could reproduce the issue locally, it'd be much easier to debug.

Found the issue!

I mistyped a single character!

(It would skip the name collection, including name aliases because this needs to be ==, not !=)

New releases soon!

Now I understand why I thought I tested this.
I tested the /realname detection on Sponge 1.21.8 because there was no .9, let alone .10, at the time.

Anyway.

Fixed in 1.1.2!