I'm sorry to say I'm having the same issue, and someone else is reporting the same on
reddit. Not trying to stir up anything---this mod is absolutely BEYOND amazing---but I'm having the same UI freezing after giving the new companion a name. Here's where it gets weird.
1. First time it happened, there was absolutely no problem. Named my guy, got a companion. 100% perfect.
2. Second time it happened on a new save, I accidentally hit the wrong dialogue option.
3. Third time, I was testing to see if it would ever trigger a second time in one save, I used cheats to level up quickly and get a huscarl, and it triggered no problem. This made me realize my second save would never get another chance, so I started another save.
4. Now, on the fourth save, the one I started specifically so I could raise a huscarl, it won't work :/ The game doesn't freeze--the newly named companion sways back and forth, but no button triggers anything. I just can't move past that screen.
No key bindings changed. I didn't touch any files. I don't know what could've changed between the first few times when it worked without an issue and this time when it simply won't work :/
Again, I love the mod! I just wanted to notify you that this may go beyond that one guy's individual problem.
EDIT: I re-installed the mod, trained up a Nord Recruit to a Nord Huscarl.... same thing. Freezes on the screen where he says his name.