I got an invite on my alt first and used it. (from an emissary)
I didn't realize at the time that the achievement is NOT account wide.
Iirc even if I was able to get another invite (which I don't think I can) I wouldn't be able to use it because the brawlers is already unlocked for all chars.
Does this mean I can no longer get this achievement on my main? (which i use for farming achi's).