Normally, that would be the case. Unlocking a class in a locked category unlocks that category. In this case, you didn't unlock a class in the category though, you added it through the mod. There's nothing to trigger the category to unlock. That's logical, but this is not a mod, it's an "offic...
Stone Warden is under the "Wilder" metaclass, which does indeed start out "locked". Most people will unlock Summoner (which is a Wilder class) pretty quickly, though. Possibly even on their first game, depending on some luck. Well, I decided to grab a copy after 5 minutes spent ...
I found it, what confused me is the fact that the category it's in is still displayed as "locked", which is rather confusing. Maybe this will help some other new players
I have registered my game, I can see Stone Warden addon, but even after I've selected a dwarf it is not visible in the available classes. What can I do?