Synchrony Bank Gardner White credit card

If you haven't done so already, I'd say it's time to contact Quicken Support on the phone during posted hours of operation and report this as an Online Banking issue. Let them do a screen share session with you to review the situation on your computer, to determine the nature of the problem and to figure out how to fix it.
Similar problems have been reported in the past. Either the bank or Intuit as the download service provider will have to intervene.