Seeing the same error. I suspect there's a compatibility issue with the audio file. I tried an audio file from an Apple demo project and I don't see the error message. However, I don't hear any audio from my app - with my wav file or the one from the Apple demo. The Apple demo app (Dioramas) works fine.

I just encounter the problem today. Attempt login to App Store Connect directly on Safari. I got the two-factor code alert, but also the failed to verify message in the browser with nowhere to enter the 2-factor code. I instead went to developer.apple.com and was able to successfully log in there, and then clicked over to App Store Connect successfully.