Answered your own question there didn't you? AM wouldn't say this unless it was true.
I know, but there's nothing for it to be mismatched against.
That is what's frustrating me. From what I've gathered lurking this usually comes up with the interference of other core mods (which I don't have, no, not even nrass) or a version issue (failure to patch or get the latest AM).
Could it be interacting with a crack? I've tried to removing the crack to the best of my ability, but this just ends in my system not even loading sims and eternally trying to launch nothing/sims 3 at the same time.
As I said, everything was working just fine until I tried to use AM.