Any luck on this I am stuck in the exactly same issue.
This is amazing how Apple makes things difficult and does not make an effort to improve the feedback on this issue with a clear troubleshooting step by step.
xcoder_aq
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Hi,
For future reference, I noticed I was trying to upload a build with development environment to AppStore. The error message is not that clear but this is the reason. Once I started uploading production environment everything works ok.