I don't remember when the problem started, I was in the castle's sleeping chambers, with most of the game already beaten and for some reason I couldn't get into the skilltree and after that CG room stopped working aswell.
I tried bathhouse several times and it doesn't help at all.
I made a new option in the cheat book in your bedroom, which will allow you to reset the related switches and fix the issue. But since you can't add files to the browser version, to update the map file yourself, you'll have to wait to the next update before the option becomes available
Sorry for the trouble.