> >TBH this looks more like a gpg than a mutt problem, and I haven't > >figured out how to debug this. Same error for encrypting. > > Yes, it sounds like something changed with either the GPGME version, or > perhaps a configuration file. I can't offer much advice except to check > those things. :(
PEBKAC. Files under ~/.gnupg deleted that shouldn't have been. Luckily I had a backup somewhere. Will know better next time.