Live Oak Bank transactions downloads had been failing for about 2 weeks now.
When I did a global multi-institution OSU, the only symptom I see is "An error has occurred". The OSU summary has no information about it. I did a full deactivate of one of my Live Oak accounts, I then went into online setup, supplied my access ID and PIN, and I got "Sorry. We encountered an error. (It's not your fault.) Quicken is having trouble connecting to Live Oak Bank. An additional message from Live Oak Bank: We're unable to complete your request. To download LiveOak account transactions into Quicken, you'll need to verify your information."
All my information appeared to be correct, I attempted this over several days.
Finally today I clicked on the setup link "Get Access ID and PIN", and went through the process of retrieving my access ID and PIN. That information did NOT change. But my next attempt to re-add that account succeeded, and transactions for all my accounts downloaded.