Unable to use native Android plugin for Unity

Question

I want to use this native plugin for Android devices through Unity. For some reason, the plugin is working now. When I run it on a real device, the game crashes. I use Unity 5.5.2f1 personal, my phone is Samsung Edge 6 with Marshmallow api.

I placed the jar file inside Assest / Plugins / Android. I can not understand what is the cause of this error. Do you know what's wrong here?

This is part of my code:

 private AndroidJavaObject plugin;

void Start ()
{
    plugin = new AndroidJavaClass("jp.kshoji.unity.sensor.UnitySensorPlugin").CallStatic<AndroidJavaObject>("getInstance");

    //Init the ambienttemperature sensor
    if (plugin != null) 
    {
        plugin.Call("startSensorListening", "ambienttemperature");
    }

}