Project Server 2010: Post SP1, June 2011 CU, Excel Services Issues.

After you have installed SP1 and the JUne 2011 CU, reports using Excel Services, might not work anymore, and it might just give you a Warning in the bottom of the browser and it will continue "Loading" but nothing will happen.

An error similar to this might be found:

An internal error occurred.
at Microsoft.Office.Excel.Server.MossHost.MossHost.Microsoft.Office.Excel.Server.Host.IEwaHost.IsSecureConnection()
at Microsoft.Office.Excel.WebUI.EwaCUIDataSource.EnsureDocument()
at Microsoft.Web.CommandUI.CUIDataSource.RunQuery(UIQuery query)
at Microsoft.Office.Excel.WebUI.EwaRibbon.QueryRibbonDataSource(CultureInfo uiCulture, String clientID, Boolean denormalizeImareUri)
at Microsoft.Office.Excel.WebUI.EwaStringsHandler.ProcessRequest(HttpContext context)


This is due to a known bug in the SP/CU, and only when the Root web App does not have a site created. So all that needs be done is to create a blank site on the root using the blank Template. I will then reboot the server to have the changes commited.