I have the exact same problem
This morning this is now happening to me. I have 2 Amex credit cards, it says I need to reauthorize. I do that thru the window that comes up, Amex says successful. But when it flips back to quicken is says it failed.
And same for me. MANY threads on this one it seems.
I just tried again, and it worked for me. I did the reauthorize through Account Settings/Reset Account. I did try that this morning, and it failed that way too. But now it seems to be working; try it out!
Having a similar problem. I can authorize my crdit card accounts but it can't find my loan account.I was advised to go to a new quicken but the same problem occured. Frustrating