If the trouble persists, I would attempt to register on the Equifax site below and see if you are able to successfully register or if you receive an error as well.
Thank you for taking the time to visit the Community to post your issue, although I apologize that you haven't received a follow-up response.
At this time I would recommend contacting support directly for advanced troubleshooting steps.
https://www.quicken.com/support#contact-support
Quicken Care has the tools to review and research this issue further.
Thank you,
-Quicken Tyka