You have to be close to the maximum XP at the level and wear things it says on the option specifically while doing it. If this is not working, please do share your save file and I will investigate it.
There was indeed an issue. Your save file helped find it, thank you. You should probably edit the comment to remove it from here now, since it’s very long and contains spoilers for the variables the game uses.
I’m hoping to keep coming back to this game once in a while when I get enough ideas and motivation to add something interesting to it. Even if this time it took a year.
