Can't see buttons only background and Sim CAS

What is the issue here? Whenever I go to try and edit a sim in cas, I just get a screen with my sim and a blank background...what is the issue? I don't have UI mods installed at! Why is it so hard for them to just not mess up the game? This is how i relax after a stressful day, ad thanks to the dev team I now have to spend my evening tracking this down.....do better!