For Rent Increase rental unit cheatcode broken

I have been trying to create a rental lot with more than 6 rental units and the code 'bb.increaserentalunitcap on' doesn't work any more.  I've tried enabling cheats using 'testingcheats true' but this makes no difference.  I can still load previous builds with more than 6 units so I know it used to work. 

So far, I have removed all mods, reinstalled the game from scratch and only enabled a small amount of dlc, (for rent, cottage living and city living, knitting and paranormal kit) and it still doesn't work.