Why the SXT Version Changer has caused this, I don't know, but this error message usually comes up after copying Homebrew from 1 memory card to another, I experianced it copying from MSDuo to MSProDuo.
The way I fixed it was to delete the troublesome Homebrew and re-install it from scratch (i.e. Copy 1.5s from original zip or Install 1.00s with Sei's or KX).
Cheers,
Fox
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