Trying to implement MSAL.Net in a C# Desktop App on .NET 4.8.

Here’s the code I’m Executing

         AuthenticationResult authResult = null;
         var app = App.PublicClientApp;
         try
         {
             authResult = await app.AcquireTokenInteractive(App.ApiScopes).ExecuteAsync();
         }
         catch (Exception ex)
         {
             Console.WriteLine(ex.Message);
         }

The code executes, the prompt window pops up blank, and it throws this error message:

Has anyone else experienced this?