Thank you for taking the time to come to the Community to post your issue, although I apologize you haven't received a response.
If you are still needing assistance with this sync error, please take a moment and review the information available here: FAQ: Common Mobile/Web Sync Errors and Solutions.
If the issue persists, I would contact support directly for more in-depth troubleshooting. To contact support please follow the link below.
https://www.quicken.com/support#contact-support
-Quicken Tyka