Can't find Config file...?

For some reason I’m running into the problem below. I don’t understand it at all, because the file is RIGHT THERE. I don’t understand why it can’t find it. Sorry for all these dumb questions. Help? :frowning:

ProffieOS:28:21: fatal error: config/CONFIG.h: No such file or directory

   28 | #define CONFIG_FILE "config/CONFIG.h"

      |                     ^~~~~~~~~~~~~~~~~

compilation terminated.

exit status 1

config/CONFIG.h: No such file or directory

Are you on windows?
Is your file actually called CONFIG.h.h? (But windows is hiding the second .h and calling it “type H” instead?)
Compare the filename with other files in the same directory. Do they show/hide the .h in the same way?

If that’s not the problem, do you have multiple proffieOS directories? Could arduino be using a different one than the one you’re looking at?