I know this is an old question, but you can test this kind of error-handling logic by temporarily adding code to throw these errors, e.g.: throw CKError(.requestRateLimited, [CKErrorRetryAfterKey: NSNumber(value: 10)

I was able to solve this using the StackOverflow question mentioned by @Claude31 below. In my case, I opened "Devices and Simulators", then unpaired the device, closed Xcode, opened Xcode, and re-paired the device.

This seems to be fixed in Beta 4

Seeing this too

Vist "developer.apple.com" and sign into your account there to renew. Not sure if you can renew from the Developer app.