[MOD RELATED] Can't assign rooms to different units

I'm also having the same issue. I downloaded a prebuilt apartment complex from the gallery, but whenever I allocate a room to a unit it instantly reverts back to a shared space. As a result I can't add new units as the option is greyed out. 

I have attempted to repair the game, and I removed all of my mods before patch day so there aren't any to conflict with the game. Not sure what to try next 😔