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java.lang.IllegalArgumentException: unknown actor creator [class akka.persistence.inmemory.journal.InMemoryJournal]	at akka.actor.IndirectActorProducer$.apply(IndirectActorProducer.scala:62)	at akka.actor.Props.producer(Props.scala:132)	at akka.actor.Props.(Props.scala:145)	at akka.persistence.Persistence.akka$persistence$Persistence$$createPlugin(Persistence.scala:280)	at akka.persistence.Persistence$PluginHolderExtensionId.createExtension(Persistence.scala:300)	at akka.persistence.Persistence$PluginHolderExtensionId.createExtension(Persistence.scala:294)	at akka.actor.ActorSystemImpl.registerExtension(ActorSystem.scala:757)	at akka.actor.ExtensionId$class.apply(Extension.scala:79)	at akka.persistence.Persistence$PluginHolderExtensionId.apply(Persistence.scala:294)	at akka.persistence.Persistence.pluginHolderFor(Persistence.scala:258)	at akka.persistence.Persistence.journalConfigFor(Persistence.scala:214)	at akka.persistence.Eventsourced$class.$init$(Eventsourced.scala:55)	at qgame.engine.pay.module.order.UnHandledReceiptActor.(UnHandledReceiptActor.scala:17)	at qgame.engine.pay.module.order.UnHandledReceiptActor$$anonfun$props$1.apply(UnHandledReceiptActor.scala:71)	at qgame.engine.pay.module.order.UnHandledReceiptActor$$anonfun$props$1.apply(UnHandledReceiptActor.scala:71)	at akka.actor.TypedCreatorFunctionConsumer.produce(IndirectActorProducer.scala:87)	at akka.actor.Props.newActor(Props.scala:214)	at akka.actor.ActorCell.newActor(ActorCell.scala:562)	at akka.actor.ActorCell.create(ActorCell.scala:588)	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:461)	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:483)	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)	at akka.dispatch.Mailbox.run(Mailbox.scala:223)	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)