Add missing mapping to identity endpoints.

(Logout did not work for example)

ServerManagement/Program.cs

@@ -85,4 +85,7 @@ app.UseAntiforgery();
 app.MapRazorComponents<App>()
     .AddInteractiveServerRenderMode(); // Provides server interactivity.
 
+// Add additional endpoints required by the Identity /Account Razor components.
+app.MapAdditionalIdentityEndpoints();
+
 app.Run();