Error in Coveo 7 Search Interface

The other day I ran into an odd error while trying to configure the Search Interface for my newly installed Coveo 7 Front-End.  After firing up the front-end, I selected ‘Edit this Interface’. Under the ‘Search Hub’ tab selecting the ‘Content’ link caused the following error: Unable to cast object of type ‘Coveo.CES.Web.Search.Admin.AdditionalPagesConfigSection’ to type ‘Coveo.CES.Web.Search.Admin.AdditionalPagesConfigSection’.