I check my Fidelity accounts occasionally online directly using the Fidelity website and app, and noticed that my accounts (IRAs and 401k) balances did not match. For my 401k I discovered that a few of the equities' prices were not correct. Tried online update of the prices but no change. So I went in and manually updated the few that were wrong and it then matched my Quicken 401k balance.
I moved on to my first IRA, and was going to manually update the equity prices but as I was doing that I discovered at least one equity that was new (shows added to my IRA Feb 17) but does not show up in Quicken. I download positions only for my IRAs and 401k and not individual transactions, so I couldn't simply add the missing fund.
Then I went to the problem IRA's "edit account details" and tried to "reset account". It took me through to the Fidelity authorization page, where I successfully logged in and it presented me with the list of my accounts to check off to include or not. All were checked and I hit submit, and a few seconds later a web page with a 404 error appeared, and did not complete the authorization.
I'm assuming there continues to be something wrong with Fidelity account downloads, even though the warning message received a few days ago about a 45 minute period downloads would not be available has long passed and no warnings when I update accounts yesterday and today.
Quicken Classic Deluxe Windows, version R66.12, running on up-to-date Windows 11 Pro