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java.lang.NullPointerException: 	at actors.AttendeeActor.(	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(	at java.lang.reflect.Constructor.newInstance(	at java.lang.Class.newInstance(	at akka.util.Reflect$.instantiate(Reflect.scala:44)	at	at	at	at	at$1(ActorCell.scala:461)	at	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)	at	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)	at scala.concurrent.forkjoin.ForkJoinTask.doExec(	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(	at