Whicked whims error message when i try to do animation with a sim.

[Kutona]

it will pop up and say "oh thats interesting! there are 2 sims around but none of them can perform this action" and it does it with any animation. i had to fix this glitch before by creating a whole new save file. now its doing it again.

[Turtledove]

I see this when they are the wrong genders, when they are performing or queued to perform an interaction - when that object is queued for use by a sim - or even if they aren't positioned so they can interact.
Hey I want you to woohoo - sorry - no - I want to sit on the bed - so you have to wait for me to finish that first. Or sorry - there's no girls here - can't do that.  Hey - I'm standing here and she's blocking me - I can't woohoo if I can't move.

So if they can talk - and they are the right gender - then they can woohoo - if you can't get them to talk - then they won't.