Hi I have a Server side MudBlazor project that was .NET 6 and MudBlazor 6.3.3

I upgraded to .NET 9 and MudBlazor 8.12.0

I then started following the steps outlined here
https://mudblazor.com/getting-started/installation#manual-install

All was going well till I got to Add References and Register Services

The app.MapStaticAssets() and builder.Services.AddMudServices();

errored saying not found.

But I got it to "work" by

app.UseEndpoints(endpoints =>
            {
                endpoints.MapStaticAssets();
                endpoints.MapBlazorHub();
                endpoints.MapFallbackToPage("/_Host");
            });

And

            builder.ConfigureServices((a) => a.AddMudServices());

But when I compile the solution, I get errors about the 2 @Assets in the _Hosts.cshtml

"The name 'Assets' does not exist in the current context"

Can anyone see what I am doing wrong here?

Thanks.

John.