That’s actually an expected (!!) info message: exiftool-vendored (which I wrote) needs either exiftool-for-windows, or exiftool-for-everyone-else, and
optionalDependency seems to be the only way to support cross-platform dependencies. Unfortunately, this (a bit scary, and not well-worded) error message is emitted by
npm. The alternative is to make a “fat” dependency that includes both windows binaries and perl binaries in one dependency (which, now that I think about it, maybe wouldn’t be so bad? I’ll think about this some more.)
Did it launch and run properly?