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:https://www.quicken.com/support/what-do-if-my-bank-not-listed-quicken-or-if-my-bank-was-recently-added-quicken
If that doesn't resolve the issue:
Please let us know if you were able to get this issue resolved (or not).