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java.lang.NullPointerException: Name is null at java.lang.Enum.valueOf(Enum.java:235)[rt.jar:1.7.0_95] at com.amazonaws.services.polly.model.VoiceId.valueOf(VoiceId.java:18)[aws-java-sdk-polly-1.11.66.jar:] at org.restcomm.connect.tts.awspolly.AWSPollySpeechSyntetizer.synthesize(AWSPollySpeechSyntetizer.java:185)[restcomm-connect.tts.awspolly-8.0.0.rlimonta-master-local.jar:8.0.0.rlimonta-master-local] at org.restcomm.connect.tts.awspolly.AWSPollySpeechSyntetizer.onReceive(AWSPollySpeechSyntetizer.java:148)[restcomm-connect.tts.awspolly-8.0.0.rlimonta-master-local.jar:8.0.0.rlimonta-master-local] at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:159)[akka-actor_2.10-2.1.2.jar:] at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425)[akka-actor_2.10-2.1.2.jar:] at akka.actor.ActorCell.invoke(ActorCell.scala:386)[akka-actor_2.10-2.1.2.jar:] at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230)[akka-actor_2.10-2.1.2.jar:] at akka.dispatch.Mailbox.run(Mailbox.scala:212)[akka-actor_2.10-2.1.2.jar:] at akka.dispatch.ForkJoinExecutorConfigurator$MailboxExecutionTask.exec(AbstractDispatcher.scala:506)[akka-actor_2.10-2.1.2.jar:] at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:262)[scala-library-2.10.1.jar:] at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975)[scala-library-2.10.1.jar:] at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1478)[scala-library-2.10.1.jar:] at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)[scala-library-2.10.1.jar:]