For First Bank Missouri/Illinois, Quicken has been unable to connect or download transactions for a couple days now. First Bank updated their website and mobile app 2 weekends ago (3/28-3/29), so I wonder if this is related to their update? I don't think I had tried downloading transactions since then until this week.
I tried resetting the account in the account "Online Services" tab, and it DOES prompt me for the 2-factor verification method which is required by First Bank, but then Quicken is unable to finish connecting. It just says, "We encountered an error while connecting to your bank".
I'm on Quicken for Windows Version R66.28, Build 27.1.66.28