Okta.sdk legacy with .net core on Mac OS

Hi All,

I’m trying to run a very simple use case with .net core + legacy sdk and having some difficulties. Here is a snippet

    static void Main(string[] args)
        const string token = "...";
        const string domain = "https://dev-xxxx.oktapreview.com";
        const string username = "mark.williams@xxxx";

        var oktaClient = new OktaClient(token, new Uri(domain));

        var uC = oktaClient.GetUsersClient();

        var u = uC.GetByUsername(username);

And the last line throws an exception:

"   at Okta.Core.Utils.Deserialize[T](String value)\n   at Okta.Core.Clients.UsersClient.GetByUsername(String userName)\n   at myOkta.Program.Main(String[] args) ..."

Can anybody confirm that legacy SDK works under .net core 2.2 on OSX?

Thank you in advance!

EDIT: I see the following in package console so hence the question
Package 'Okta.Core.Client 0.3.3' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETCoreApp,Version=v2.2'. This package may not be fully compatible with your project.