I get the messagae below when trying up update "site settings" for one portal - this dies not occur with other portals in the DNN installation. (I have no problem reading the settings - just can't update them)

DNN 4.9.0

Can anyone offer any help on tracking this down?

====================================================

ModuleId: 987
ModuleDefId: 14
FriendlyName: Site Settings
ModuleControlSource: Admin/Portal/SiteSettings.ascx
AssemblyVersion: 04.09.04
PortalID: 14
PortalName: XXXX
UserID: 1
UserName: host
ActiveTabID: 509
ActiveTabName: Site Settings
RawURL: /lgallery/Admin/SiteSettings/tabid/509/language/en-US/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://.../Admin/SiteSettings/tabid/509/language/en-US/Default.aspx
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3 (.NET CLR 3.5.30729)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: beea2cd6-4b6b-46c9-9192-ec635bf75617
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Admin.PortalManagement.SiteSettings.cmdUpdate_Click
StackTrace:
Message: 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.Modules.Admin.PortalManagement.SiteSettings.cmdUpdate_Click(Object sender, EventArgs e) --- End of inner exception stack trace ---
Source:
Server Name: WIN4

I had this problem. I had manually cleared out my database before migrating it to another server and also deleted the admin user for the default (and only) portal. I added a new admin user and the error went away. It's worth noting that I got errors whilst creating the new user and also when adding the admin role to the new user. But it does actually do the necessary creation.