What the title says. When I did the Proving Honor quest and had Farkas as a follower (the quest where he suddenly turns into a werewolf for the first time), I came to a chamber where there was an arcane enchanter and two thrones. One of the thrones were broken.

When I tried to sit on the throne that was not broken, nothing happened. Same with the enchanter. I tried to use it by pressing space, but nothing happened. Is this a known bug?

At first I wondered if my space key was not working, but I could talk to Farkas, so that was not the problem. And when I got back to Whiterun I could sit on benches and at least use the Alchemy lab at Arcadia's.