@Gcarr looks like Newtonsoft.Json.dll dependency may be missing from your installation (typically from C:\Program Files\Team MediaPortal\MediaPortal).
@ajs does this come with MediaPortal...
I have decided to rework this post, becouse is no longer relevant. The SharpDX version is already included in MediaPortal since version 1.32.
I will place on this post the preliminary installers...