Object reference not set to an instance of an object.   at Microsoft.SharePoint.Administration.SPPolicyCollection.get_PolicyCache()
   at Microsoft.SharePoint.Administration.SPNativeConfigurationProvider.GetCommonApplicationProperties(Guid applicationId, Int32 currentZone, Boolean& recycleBinEnabled, Int32& newIndicatorCutOff, Boolean& presenceEnabled, Boolean& syndicationEnabled, Object& securityPolicyCache, Object& zoneUrls, String& officialFileName)
   at Microsoft.SharePoint.Library.SPRequestInternalClass.PreInitServer(String bstrAbsoluteRequestUrl, String bstrServerRelativeUrl, Int32 lZone, Guid gApplicationId, Guid gSiteId, Guid gDatabaseId, String bstrDatabaseServer, String bstrDatabaseName, String bstrDatabaseUsername, String bstrDatabasePassword, Boolean fHostHeaderIsSiteName)
   at Microsoft.SharePoint.Library.SPRequest.PreInitServer(String bstrAbsoluteRequestUrl, String bstrServerRelativeUrl, Int32 lZone, Guid gApplicationId, Guid gSiteId, Guid gDatabaseId, String bstrDatabaseServer, String bstrDatabaseName, String bstrDatabaseUsername, String bstrDatabasePassword, Boolean fHostHeaderIsSiteName)
   at Microsoft.SharePoint.SPSite.PreinitializeServer(SPRequest request)
   at Microsoft.SharePoint.SPWeb.InitializeSPRequest()
   at Microsoft.SharePoint.SPWeb.EnsureSPRequest()
   at Microsoft.SharePoint.SPWeb.get_Request()
   at Microsoft.SharePoint.WebControls.SPControl.SPWebEnsureSPControl(HttpContext context)
   at Microsoft.SharePoint.WebControls.SPControl.GetContextWeb(HttpContext context)
   at Microsoft.SharePoint.ApplicationRuntime.BaseApplication.Application_PreRequestHandlerExecute(Object sender, EventArgs e)
   at Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.PreRequestExecuteAppHandler(Object oSender, EventArgs ea)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)