MVVM Toolkit Errors

[QJS-RH]

VS 2022 17.5.0
Create WPF Application and add Nuget package CommunityToolkit.Mvvm 8.1.0

Immediately analyzers show errors MVVMTK0008 with an X, 0020 with an X, 0032 with Info, 0033 with Info and 0034 with Info.
Code compiles and runs.

As I program more, more errors appear Generally CS0103

Adding a simple class as

`using CommunityToolkit.Mvvm.ComponentModel;

namespace RHOKSWPF_Working;

public partial class MainProgressBarVM : ObservableObject
{
private readonly string ProgressMessage = "Loading Application";

public MainProgressBarVM()
{
    ThisIsMyVariable = ProgressMessage;
}

[ObservableProperty] private string? thisIsMyVariable;

}
`

Produces Error CS0103

csproj file for reference.