Hello adipFTW,
That particular file is a .generated.h file. These are part of the Intermediate folder and are generated when you generate your project files. They would not be present on Github as the files on Github are of a build that has yet to have project files generated for it. It sounds like a herring, an error that is saying something that we shouldn’t really be focusing on.
Are you attempting to package a Dedicated Server? If so, this is something that you’ll need a source build to do, as building for Development Server is not available in a Binary build.