Typically, this is a result of the password being expired or a password change being required.
Try to log in through [yourBBNCdomain]/login.aspx. If your password is expired or a password change required, you'll be prompted to reset a new password.

If this is occurring for a user, who is not a Supervisor user, this indicates the user may have been created through the Add Users Utility or through Users & security > Users. When a user is created through the Add Users utility within the NetCommunity plugin inEducation Edge or through the Users gallery in Blackbaud NetCommunity, they will be prompted to reset their password the first time they log in. There are two ways the user can reset their password: See: Error: Password change required. Click here to go to the admin login page. - when logging in

We are currently evaluating this issue and will update this article when we have more information.