The online connection for Barclays US is no longer working. I went to the site manually and they have a completely new website and login URL. They also have changed the password rules to include a special character.
I tried resetting my Quicken Barclays account and it refuses to connect to Barclays anymore.
Looks like Quicken needs to update their connection process for Barclays US.
I think I was getting a CC-503 error. I did submit the "report a problem" data from one step update summary page.