I think I've missed the opportunity to make a useful experiment, as notarytool seems to be consistently working now even with the original command line. My thanks to whoever at Apple fixed this!

I'd be happy to try key-based authentication, but I don't think I know how. I'm not sure I understand the documentation. What should the command options look like for that?

I've been getting this error intermittently for several days, but today it seems to be happening 100% of attempts. Feedback filled: FB17763219 Bob

Was there ever a solution to this? I'm facing the same problem with some custom hardware.

Whatever was causing this seems to be fixed starting about or before 11:40 PM March 2023. I've had several successful runs since then.

I'm seeing this error 100% of the time since yesterday (9:05PM Eastern Daylight time March 6).