Faceted Search 2.0 error

Today I had to install Faceted Search 2.0 at the SharePoint Farm of a Customer. Installation did not give any problems, but when I browsed to the web part gallery to check if the SearchFacets webpart was working the following error appeared:

The type initializer for
‘Microsoft.Office.Server.EvaluatorModeProvisioning.OfficeServerProductToProvision’
threw an exception.

After some searching on the internet I found the solution which I have tested with success. To solve this error do this:

Copy C:\Inetpub\wwwroot\wss\VirtualDirectories\<>\bin\Microsoft.SharePoint.Portal.ExtendedSearch.DLL
to C:\Windows\Assembly
Perform a IISreset

Tags: error, GAC, solution