Unable to upload app to iTunes Connect - iTunes Store operation failed. Authentication timeout

Question

I\'m trying to upload my app to iTunes Connect with Xcode. I chose product > archive, choose my account, it compiles and when I try to upload it hand for a long time on:

Answer 1

I got this error when trying to upload an app to App Store Connect (01/20/2020). Restarting Xcode fixed the issue for me.