Hey,
I have a temporary solution that worked for me at least once. Going to test more.
- Go to Project Settings > Supported Platforms, then uncheck all the platforms you are not going to use, just leave Windows. Otherwise you will get errors after the third step.
- Copy your project to the new directory.
- Go to the project directory, then “Saved” and delete all the folders. Always backup everything.
- Add the project to your Unreal Launcher.
- Voila, it SHOULD package the latest version of your project.
Let me know you if you have any luck!