I have a site that was I believe 4.7.x. I upgraded to 4.8.4, then to 4.9.0. It all seemed to work fine, the site is working and I'm able to add pages, etc. But now the sitemap.aspx is giving an error message. I changed the error setting to "Off" in the web.config file, and it's giving a 404 Page Not Found error when I try to load sitemap.aspx:

The remote server returned an error: (404) Not Found.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Net.WebException: The remote server returned an error: (404) Not Found.

Source Error:

[WebException: The remote server returned an error: (404) Not Found.]
   System.Net.WebClient.OpenRead(Uri address) +486
   System.Net.WebClient.OpenRead(String address) +26
   DNNMasters.SEO.Rewrite.RewriteUrl.get404PageContent(HttpApplication app) +440
   DNNMasters.SEO.Rewrite.RewriteUrl.context_BeginRequest(Object sender, EventArgs e) +5057
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

I copied the sitemap.aspx and sitemap.aspx.vb files back over to the server in case they were corrupt or something, but no changes. Any thoughts?

Thank you!

Tom