Hello @kevin Tinkelman
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. I'm wondering here if we may be able to fix this be restoring a recent backup then deactivating the mortgage accounts. There is also the possibility that the cc-800 error might of just lined up at a poor timing. Let's start off with the backup and see what we're able to find out. I'll leave steps down below.
https://www.quicken.com/support/how-backup-or-restore-your-quicken-data
Once you've done this try to deactivate the mortgage then try to update your accounts. I would also recommend creating a copy with the backup rather than overwriting your current one.
Once you get the chance let us know what you're able to find out and we'll see what we can try next,
Thanks,
Quicken Francisco