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

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java.lang.NullPointerException:
at com.registrodevisitas.services.ConfiguradorGeneralService.leerConfiguracion(ConfiguradorGeneralService.java:50)
at com.registrodevisitas.services.ConfiguradorGeneralService.(ConfiguradorGeneralService.java:34)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1208)
at com.airhacks.afterburner.injection.Injector.lambda$getDefaultInstanceSupplier$8(Injector.java:233)
at com.airhacks.afterburner.injection.Injector.access$lambda$3(Injector.java)
at com.airhacks.afterburner.injection.Injector$$Lambda$4.apply(Unknown Source)
at com.airhacks.afterburner.injection.Injector.instantiateModelOrService(Injector.java:116)
at com.airhacks.afterburner.injection.Injector.injectMembers(Injector.java:151)
at com.airhacks.afterburner.injection.Injector.injectMembers(Injector.java:136)
at com.airhacks.afterburner.injection.Injector.injectAndInitialize(Injector.java:129)
at com.airhacks.afterburner.injection.Injector.registerExistingAndInject(Injector.java:107)
at com.airhacks.afterburner.injection.Injector.instantiatePresenter(Injector.java:60)
at com.airhacks.afterburner.views.FXMLView.lambda$loadSynchronously$2(FXMLView.java:89)
at com.airhacks.afterburner.views.FXMLView.access$lambda$1(FXMLView.java)
at com.airhacks.afterburner.views.FXMLView$$Lambda$2.call(Unknown Source)
at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:929)
at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971)
at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at com.airhacks.afterburner.views.FXMLView.loadSynchronously(FXMLView.java:91)
at com.airhacks.afterburner.views.FXMLView.initializeFXMLLoader(FXMLView.java:100)
at com.airhacks.afterburner.views.FXMLView.getView(FXMLView.java:112)
at com.registrodevisitas.RegistroDeVisitas.lambda$init$0(RegistroDeVisitas.java:55)
at com.registrodevisitas.RegistroDeVisitas.access$lambda$0(RegistroDeVisitas.java)
at com.registrodevisitas.RegistroDeVisitas$$Lambda$1.get(Unknown Source)
at com.gluonhq.impl.charm.a.d.a.a(SourceFile:32)
at com.gluonhq.charm.glisten.application.MobileApplication.a(SourceFile:620)
at com.gluonhq.charm.glisten.application.MobileApplication.switchView(SourceFile:391)
at com.gluonhq.charm.glisten.application.MobileApplication.switchView(SourceFile:368)
at com.gluonhq.charm.glisten.application.MobileApplication.start(SourceFile:218)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$144(LauncherImpl.java:863)
at com.sun.javafx.application.LauncherImpl.access$lambda$8(LauncherImpl.java)
at com.sun.javafx.application.LauncherImpl$$Lambda$9.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$157(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.access$lambda$6(PlatformImpl.java)
at com.sun.javafx.application.PlatformImpl$$Lambda$7.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$155(PlatformImpl.java:295)
at com.sun.javafx.application.PlatformImpl.access$lambda$18(PlatformImpl.java)
at com.sun.javafx.application.PlatformImpl$$Lambda$19.run(Unknown Source)
at java.security.AccessController.doPrivileged(AccessController.java:52)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$156(PlatformImpl.java:294)
at com.sun.javafx.application.PlatformImpl.access$lambda$5(PlatformImpl.java)
at com.sun.javafx.application.PlatformImpl$$Lambda$6.run(Unknown Source)
at com.sun.glass.ui.monocle.RunnableProcessor.runLoop(RunnableProcessor.java:92)
at com.sun.glass.ui.monocle.RunnableProcessor.run(RunnableProcessor.java:51)

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