Sim from Gallery becomes black

I've just come across a similar issue, except mine is with a Sim.  I don't have Pets yet, I only have the free holiday pack, Island living, and Vampires, and I'm up to date on new patches. I do run mods and CC. I was editing a previously saved sim (that I had previously edited) from where I saved the sim in the game.  The sim had been downloaded from my library before (a couple months ago) and comes from another gamer's upload.  I tried the cheat edits and it doesn't work.  Interestingly, this sim is in a household with two other sims and they are fine.  I've never posted here before, but it's the closest one I found to what I'm looking for.  So I hope it's okay that it's here.