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Question

1. I regenerate all of the certificates, update the version number of the app

Answer 1

I had the following issue when submitting a build which was uploaded couple of days ago for test flight testing. Then figured out that the provisioning profile of the application has expired so I renewed the prov profile and downloaded and re-archived the application (by increasing only the build number ) and uploaded and submitted it. And it worked like a charm.

I guess apple need to be specific of these error scenarios