App submission failed - 1+ corrupted binaries/non-public API usage and no additional details

Question

I’ve been submitting my app to the App Store for test flight and after build 11, I’ve been getting failures via email from Apple:

Non-public API usage: The app conta

Answer 1

Seems like the problem was fixed in the iTunes Connect backend. After build 45 we got through yesterday evening. Tried to find out what fixed the problem from all those changes - seems to go through with the inital build as well now.

So three days I could have spent outside...