How do you fix the problem
There is an Alert posted about this: NEW 8/16/24 Discover Card - CC-502/FDP-102.
There are also several threads posted about this issue. You can do a search in this Community for "Discover" and filter it to show posts for this month only. Per these threads, it appears that no one has found a fix for it that we can implement. Looks like we'll probably need to wait until Quicken, Intuit and/or Discover fix whatever is causing the issue.
My connection and downloads to Discover started working as of last week. Just FYI