WorkPlace User Receives "You do not have sufficient permission to access this resource" Error

A user accessing WorkPlace receives the following error message in his or her browser:

You do not have sufficient permission to access this resource. To return to the previous page, close this instance of the browser.

This error message is the default error message shown when a user is denied access to a Web resource. It can be caused by a WorkPlace access control rule that fails to allow users access to the WorkPlace resource.  By default, the rule allows all users access to WorkPlace; adjust the rule appropriately for your environment.