I have two different instances of DNN both running version 4.09 on th 2.0 framework with integrated pipeline mode.  One DNN portal i can log in as host and select portals>export portal template and I will be given options to export the template.  On the other site, I am not given options to export the tamplate, just a blank page; however, there is a module looking item beneath the portal listing which says export modules which when I fill out tells me the following:

Error: Export Template is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Entities.Tabs.TabController.SerializeTab(XmlDocument xmlTab, Hashtable hTabs, TabInfo objTab, PortalInfo objPortal, Boolean includeAllModules, Boolean includeContent) at DotNetNuke.Entities.Tabs.TabController.SerializeTab(XmlDocument xmlTab, Hashtable hTabs, TabInfo objTab, PortalInfo objPortal, Boolean includeContent) at DotNetNuke.Modules.Admin.PortalManagement.Template.SerializeTabs(XmlDocument xmlTemplate, XmlNode nodeTabs, PortalInfo objportal) at DotNetNuke.Modules.Admin.PortalManagement.Template.cmdExport_Click(Object sender, EventArgs e) --- End of inner exception stack trace ---

Am I missing something?