Not sure this will get fixed soon.
We now have the new playerbot system working with wotlk, so i dont see a reason that the old one (deprecated one) should still get maintained.
But thats just my opinion about this

I have been compiling the new playerbot, but there was an absolute fail in compiling, so i jumped back to old, and it compiled very clean up to this error.

I am in the process of rerun the new playerbot right now and will be posting the warnings and errors, but it will take a bit as it stall (or does not update terminal screen) for over ten minutes

Not sure this will get fixed soon. We now have the new playerbot system working with wotlk, so i dont see a reason that the old one (deprecated one) should still get maintained. But thats just my opinion about this

I have been unable to get the new playerbot to work completely see issue #3798

-- CMaNGOS-Core revision : 685b5983e5edc6070fc51c8dca9eb8c67dee9e8b
another error appeared

/home/mangos/cmangos/wotlk/src/game/Server/WorldSession.cpp: In member function ‘void WorldSession::LogoutPlayer()’:
/home/mangos/cmangos/wotlk/src/game/Server/WorldSession.cpp:812:9: error: ‘stmt’ was not declared in this scope; did you mean ‘stat’?
  812 |         stmt = CharacterDatabase.CreateStatement(updChars, "UPDATE characters SET online = 0 WHERE guid = ?");
      |         ^~~~
      |         stat

You're building with the old/deprecated playerbots on, correct? Edit: never mind, it's even mentioned in the issue title.🤦
When the new playerbot code was introduced they accidentally broke the old version. I ran into the same issue in the TBC core last week, see my fix in cmangos/mangos-tbc@d52f844. You could try to apply a similar patch (I assume the WoTLK code is pretty similar) as a test.