CCC-501 error on Chase Bank accounts and Discover since 10/29.

Intuit continues to have difficulty maintaining the Express Web Connect connection method for Quicken.  If you are not willing to accept the unreliability of this connection method, I suggest you use the Direct Connect or the Web Connect connection method if available instead.  If you haven't already, you may want to review: https://www.quicken.com/support/how-quicken-connects-your-bank

If you insist on using the Express Web Connect connection method, I suggest you review: https://www.quicken.com/support/error-when-using-online-services-cc-501