I had filed FB22239913 which is still open. My eMail ticket for Developer Support also was not actioned. Eventually I ran out of patience and called developer support instead. The agent was able to identify the issue quickly ("something specific about your account, nothing you can do anything about"). They escalated it and it was resolved within 48h.

I have the exact same issue for both my iOS apps. Can't add them to external testers in testflight either.

Has anybody gotten this resolved? I see this as a global issue in my developer account too and can't proceed with anything in development :(

I have the same, across all applications. All builds were expired, one during initial review phase. I can't add any build to testflight and only get "There was an error processing your request. Please try again later."