Hello @Autoadvisor
Thank you for reaching out to the Community regarding your issue, although I am sorry to hear that you are experiencing issues with your Quicken Card. We currently are experiencing issues with US Bank and it could be the reason you're having difficulty adding your card. We are currently looking into the issue but do not have an ETA. I would recommend following the post down below for more information regarding the issue and for any future updates. You can do so by going to the right of the title and clicking the ribbon.
https://community.quicken.com/discussion/7898185/quicken-credit-card-us-bank-cc-501-101#latest
Thanks,
Quicken Francisco