Unable to select traits in CAS

This issue has occurred since the last patch update yesterday - the Traits section in CAS is now completely blank. I've not had mods in my game for over a month (since before the last major update). I've barely played Sims 4 since the recent bugs. But I went in to get the event rewards. After completing the event, I tried to create a new sim but couldn't select any traits. 

editing to add: I went back to an older save file, and I could pick traits in CAS. But when I start a brand new save file, I can't.