When clicking the Unsubscribe or Email Preferences link within an email, the page results in a Runtime Error. You may also see a custom error page, if your organization is using this in place of the standard Runtime error. The user is not able to manage their email preferences or unsubscribe for the mailing.
Typically, clicking the link again will allow the user email preferences page to display. If the error persists, direct users to the User Email Preferences page on your website. For users with username, they can log in and change their preferences on this page. For users who do not have a login, they must make they change through another email.