Have you tried this yet (if your bank recently changed their website or password requirements)?
How to refresh financial institution information (Branding)
Please read and follow instructions here: How do I refresh my financial institution information in Quicken?
For online billers please see if you can manage (remove and re-add) the online biller, to see if their profile has already been updated.
If that doesn't resolve the issue:
Please let us know if you were able to get this issue resolved (or not).