Has this been working, and just started happening with the CC-800 error - or a brand new Add Account ?
What version - Help —> About Quicken
What exact Quicken Account name have you selected for - Fidelity Rewards Visa - is this it -
65942 65942 65942 Fidelity Rewards Credit Card https://login.fidelityrewards.com/ https://login.fidelityrewards.com/onlineCard/login.do ACTIVE BANKING,CREDIT,ACCOUNTINFO&EXP-WEB-CONNECT