An unexpected failure occurred while logging in (Underlying error code 1100)

Question

I got this error when trying to run an app on the device.

The operation couldn’t be completed. Unable to log in with account '[email protected]'. An unexpected failure occurred while logging in (Underlying error code 1100).

Answer 1

You can check if Apple's systems are currently under maintenance by visiting: https://developer.apple.com/system-status/

Answer 2

It turned out that Xcode has signed me out from my apple ID account.

So I went to

Xcode -> Preference -> Accounts 

and re-logged into my account again.

and now the error is gone

Answer 3

If everything is fine with https://developer.apple.com/system-status/ the problem might be when you have low space on disk where is macOS and Xcode. Had the same problem, did remove some unused apps to free some space and after restarting Mac everything started working again.