Choden

  I do have a lot of scripted mods, its doesn't always take long to register new mods, it just has at times. Anyways my problem came back, because I uninstalled some mods and installed others. Every single time I installed a new mod I got the error. I would fix the load order and it's gone. One of the mods I installed had an esm file and I just now realized it was loading after creatureframework.esm, of course I got the error. So I had to put creatureframework as the last esm to load and problem is gone again. Go figure.

I had this same issue, The way I fixed it for me was extremely simple. I put more nasty critters plugin to load last after other plugins included in this mod. You have to read his description page, he has more nasy criiters loaded first before other plugins, but if you read a little further he contradicts that and says to put it last. I did that loaded my game and had no error popup. When you load your game you might have to wait, be patient, it took about 10 mins before I got the message Sexlab Creature Animations installed. I have waited 20 plus minutes for Skyrim to reconize new mcm menus, long enough to forget that I had installed a new mod. Checked SexLab and all the animations were there. Do they work I don't know haven't tried yet.