Which bank would that be?
How to refresh financial institution information (Branding)
Have you tried this yet?
If your bank recently changed their website or password requirements please read and follow instructions here:
For online billers please see if you can manage (remove and re-add or repair) 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).