Officially SIMS 4 Studio can only be used together with Blender 2.7. The most current compatible version is 2.79b. Beyond that, the file from the most recent Blender can't be imported to SIMS 4 Studio.
But there's still away to enable you to work in Blender 2.8.
After your work is done in Blender 2.8. All you have to do is APPEND your the file into Blender 2.7 and save it there.
The rest is as usual.