Exception on using example in GITHUB encoding 850

Prerequisites

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Description

System.Reflection.TargetInvocationException: 'Failed to load language 'IronPython 3.4.0b1': No data is available for encoding 850. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method.'

Steps to Reproduce

1. Console app either NET6 or NET CORE 3.1

2. System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance); //UNSUCCESSFUL TRY adding this.

3. The code:
   public class Program
   {
   static void Main(string[] args)
   {

        var eng = IronPython.Hosting.Python.CreateEngine();
        var scope = eng.CreateScope();
        eng.Execute(@"
            def greetings(name):
                return 'Hello ' + name.title() + '!'
            ", scope);
        dynamic greetings = scope.GetVariable("greetings");
        System.Console.WriteLine(greetings("world"));
    }
   

   }

Expected behavior:

Shot the greeting in console

Actual behavior:

TargetInvocationException

Versions

IronPython 3.4.0b1

Start with the .NET console reproduction using IronPython.Hosting.Python.CreateEngine and the CodePagesEncodingProvider registration, then investigate where loading IronPython 3.4.0b1 requests encoding 850. Done means the supplied greetings example runs on .NET 6 or .NET Core 3.1 and prints the expected greeting without a TargetInvocationException.