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:

Uploading Archive Sending API usage to iTunes Connect... 

Then it shows an error message:

I've restarted Xcode and the entire machine but still it keeps repeating itself.

What's wrong here?

Answer 1

This usually happens to me when the phone is connected while uploading the archive, and removing the phone so far has been solving the issue for me.