The outfit things is weird, did you have cc on your sim or unlocked outfits that caused them not to change correctly by any chance?
One time I have had to change them into another outfit so they can change back correctly and another time I had to change them from everyday wear to formal and then they got the right career wear for performing. Both times this happened on my second computer - the one that does have cc in it. In one case my sim was wearing some of that cc and in another case was not, although some of her alternate outfits (formal and pjs) were cc.
I have yet had it happen on my game never gets any cc on it but I don't know for sure its cc related. I have been trying to find out from others who have had this issue, corrected by just changing outfits to see if they had cc in their game or not, but have not heard back yet.
No I don't have any CC in my game and I had this issue last night for min.
My sim can not set up the stage, once i click on set up stage in any of the 3 options. She will walk on stage then has the bubble that shows she can not walk there.