Hi, I'm experiencing the exact same "invalid OAuth response from apple.com" error, but with one key difference: in my case the Apple authentication screen never appears at all — the error returns immediately on button tap. This makes me think it might be an Apple backend issue with my Team ID specifically. I posted my full setup here: https://developer.apple.com/forums/thread/826547 Did you ever find a resolution? I'd love to hear if you made any progress after 6 months.

Hi charlesrocher, Did you solve your problem?