java.exe exited with code 1 -LinkOS_Xamarin_SDK

Currently we are building an native Android app which talks to the Zebra printer for printing stickers.  We are using Xamarin for the development.  And we are currently using the latest version of VS 2017.  We have added the plugin  LinkOS_Xamarin_SDK to our native android app.  (Note that, we are not using Xamarin forms). But after adding this SDK , our project does not compile. We get an error " java.exe exited with code 1" . Can you please help ?