Just adding to the chorus here, getting the same error message others have screenshot. I have been successfully downloading Citi card transactions for YEARS. My other linked accounts are still working without an issues. I've read through all of this posts and this is, as it nearly always is, something that needs to be fixed on QuickBooks' end. I've been using Quickbooks for 20 years, and the usual trend is for Quickbooks to deny it could possibly be an issue, then there will be an update installed (FWIW, this current issue started after my most recent update), and then it will "magically" start working again. It's crazy making.