I have a sneaky suspicion that it might be because of the the path name using backslashes on Windows, which would mean i can just do a tiny little change to fix it
Glad to hear it solved your issues. fwiw, I stopped using raw Windows for development and switched to WSL a few months back because when Vercel builds the project before we process it, there are so many different quirks that can pop up on Windows, although this issue was on us this time