Is this still an issue?

Yes. I also can't change Age category on +14 Prove https://kino.kz/movie/4451

Ah, ok. Not all age rating/certification systems for the different countries around the world are available to the database. I believe this is something that the admin (Travis) needs to add on the backend of the system for it to be enabled. You need to suggest that the certification system for Kazakhstan be added here.