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Could not initialize class akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool
java.lang.NoClassDefFoundError: Could not initialize class akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinPool	at akka.dispatch.ForkJoinExecutorConfigurator$ForkJoinExecutorServiceFactory.createExecutorService(ForkJoinExecutorConfigurator.java:432)	at akka.dispatch.Dispatcher$LazyExecutorServiceDelegate.executor$lzycompute(Dispatcher.java:40)	at akka.dispatch.Dispatcher$LazyExecutorServiceDelegate.executor(Dispatcher.java:40)	at akka.dispatch.ExecutorServiceDelegate$class.execute(ExecutorServiceDelegate.java:209)	at akka.dispatch.Dispatcher$LazyExecutorServiceDelegate.execute(Dispatcher.java:39)	at akka.dispatch.Dispatcher.registerForExecution(Dispatcher.java:115)	at akka.dispatch.MessageDispatcher.attach(MessageDispatcher.java:131)	at akka.actor.dungeon.Dispatch$class.start(Dispatch.java:99)	at akka.actor.ActorCell.start(ActorCell.java:374)	at akka.actor.ActorCell.start(ActorCell.java:374)	at akka.actor.LocalActorRef.start(LocalActorRef.java:341)	at akka.actor.LocalActorRefProvider.guardian$lzycompute(LocalActorRefProvider.java:632)	at akka.actor.LocalActorRefProvider.guardian(LocalActorRefProvider.java:626)	at akka.actor.ActorSystemImpl.guardian(ActorSystemImpl.java:657)	at akka.actor.ActorSystemImpl.terminate(ActorSystemImpl.java:690)	at akka.actor.ActorSystemImpl.liftedTree2$1(ActorSystemImpl.java:675)	at akka.actor.ActorSystemImpl._start$lzycompute(ActorSystemImpl.java:663)	at akka.actor.ActorSystemImpl._start(ActorSystemImpl.java:663)	at akka.actor.ActorSystemImpl.start(ActorSystemImpl.java:679)	at akka.actor.ActorSystem$.apply(ActorSystem.java:141)	at akka.actor.ActorSystem$.apply(ActorSystem.java:108)	at com.percebemusic.pianoapp.core.package$.(package.java:14)	at com.percebemusic.pianoapp.core.package$.(package.java)	at com.percebemusic.pianoapp.desktop.ui.Main.registerServices(Main.java:187)	at com.percebemusic.pianoapp.desktop.ui.Main.start(Main.java:97)	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)	at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)	at java.security.AccessController.doPrivileged(AccessController.java)	at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)	at com.sun.glass.ui.win.WinApplication._runLoop(WinApplication.java)	at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)	at java.lang.Thread.run(Thread.java:745)