Why C# PowerShell.Create() returns null in case of .NET Core?

I have library built for .NET Standard 2.0.

I am using this library in

• a .NET Core project and
• a .NET Framework project.

I have integrated this PowerShellStandard.Library (Version 5.1.0) nuget into my .NET Standard library. It is used to fetch some date which is connected to PC.

private string RunPowerShellCommand(string paramValue)
{
    using (PowerShell powershell = PowerShell.Create().AddCommand("Get-PnpDeviceProperty").AddParameter("InstanceId", paramValue).AddParameter("KeyName", "DEVPKEY_Device_Parent"))
    {
        var result = powershell.Invoke();
        string deviceId = "";
        foreach (var r in result)
        {
            var properties = r.Properties;

            var device = (string)properties.Where(t => t.Name == "Data").FirstOrDefault().Value;
            deviceId = (string)device;
        }
        return deviceId.Split('\\')[2];
    }
}

• When I call above code from the .NET Framework project then the PowerShell.Create() returns the proper PowerShell object
• When I call same code from the .NET Core project then it returns null.

Could anyone me please ?!