In my Portal 0 I have two users showing up in the list of SuperUser accounts as displayed through the <Host>SuperUser Accounts> menu item and selecting All for display. When I try to edit their properties to remove SuperUser status or see their profile, I get:

An error has occurred.
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.Modules.UserModuleBase.get_IsUser() at DotNetNuke.Entities.Modules.UserModuleBase.get_IsProfile() at DotNetNuke.Modules.Admin.Users.ManageUsers.get_ModuleActions() at DotNetNuke.UI.Modules.ModuleInstanceContext.LoadActions(HttpRequest Request) at DotNetNuke.UI.Modules.ModuleInstanceContext.get_Actions() at DotNetNuke.UI.Containers.ActionBase.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---

This account doesn't exist.

When I click the red X to delete user, nothing happens. They do not show as Authorized (checkboxes not checked). Both their rows in the Users table have IsSuperUser=0. Both of these valid users were previously members of a child portal that was deleted (without errors in the UI). Somehow I doubt that's a coincidence. Does anyone know where the query to display all for the SuperUsers is getting its data, and/or where else I might look to remedy this?

TIA...