java.lang.NullPointerException: This exception has no message.

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at net.sf.kraken.protocols.xmpp.XMPPListener.processMessage(
at org.jivesoftware.smack.Chat.deliver(
at org.jivesoftware.smack.ChatManager.deliverMessage(
at org.jivesoftware.smack.ChatManager.access$200(
at org.jivesoftware.smack.ChatManager$2.processPacket(
at org.jivesoftware.smack.PacketReader$ListenerWrapper.notifyListener(
at java.util.concurrent.Executors$
at java.util.concurrent.FutureTask$Sync.innerRun(
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(
at java.util.concurrent.ThreadPoolExecutor$

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