I have recntly encounterd a problem with the 3.8.X MVPs. None of the mods that uses them will load. No error messees, it just says it is launching for a few seonds then...nothing.
I did a verify file integrity on the MVPs themselves and I got the error message shown in the pic. It says 'do you want to re-download them'. I say yes, it downloads them, but the problem persists. If I run the verify integrity tool again, the same error pops up.
NB they were working fine before.
[attachment stolen by Russian hackers]