Messages not getting read properly

[skanakas]

The pipe is being closed
Exception in thread "main" java.lang.IllegalStateException: Not a JSON Object: null
at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90)
at com.nqysit.whatsapp.Client.parseMessages(Client.java:130)
at com.nqysit.whatsapp.Client.ListenIncomingMessages(Client.java:59)
at com.nqysit.whatsapp.EchoDemo.main(EchoDemo.java:24)

Though there are unread messages, it doesn't read it. Kindly fix or let us know what is the issue? we will fix it