Error connection

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: appname, PID: 16774
    java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:448)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
    Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
    Caused by: org.json.JSONException: End of input at character 0 of
    at org.json.JSONTokener.syntaxError(JSONTokener.java:449)
    at org.json.JSONTokener.nextValue(JSONTokener.java:97)
    at org.json.JSONArray.<init>(JSONArray.java:92)
    at org.json.JSONArray.<init>(JSONArray.java:108)
    at appMain.handleJson(Main.kt:181)
    at appMain.access$handleJson(Main.kt:30)
    at appMain$AsyncTaskHandleJson.onPostExecute(Main.kt:176)
    at appMain$AsyncTaskHandleJson.onPostExecute(Main.kt:154)
    at android.os.AsyncTask.finish(AsyncTask.java:695)
    at android.os.AsyncTask.-wrap1(Unknown Source:0)
    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:712)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6494)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)