Thanks for the link to the documentation. I solved a different problem I had using a different new API on that page. Cheers!

It turned out to be an App Store Connect problem. I had to call Apple by phone and talk to support to find out what the actual error was, and it turned out to be something weird like we were trying to use the same name for our app before we got the system to release that name from a previous project we had used. Something like that. You can find the contact info here: https://developer.apple.com/contact/topic/select Good luck. It was a total nightmare.

Booooooooooo. But thank you for answering the question. :)