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java.lang.InstantiationException: 	at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)	at java.lang.reflect.Constructor.newInstance(Constructor.java:408)	at java.lang.Class.newInstance(Class.java:433)	at sun.reflect.misc.ReflectUtil.newInstance(ReflectUtil.java:51)	at javafx.fxml.FXMLLoader$InstanceDeclarationElement.constructValue(FXMLLoader.java:1010)	at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:740)	at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2723)	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)	at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2425)	at com.oracle.javafx.scenebuilder.kit.library.util.JarExplorer.instantiateWithFXMLLoader(JarExplorer.java:105)	at com.oracle.javafx.scenebuilder.kit.library.util.JarExplorer.exploreEntry(JarExplorer.java:146)	at com.oracle.javafx.scenebuilder.kit.library.util.JarExplorer.explore(JarExplorer.java:65)	at com.oracle.javafx.scenebuilder.kit.library.user.LibraryFolderWatcher.exploreAndUpdateLibrary(LibraryFolderWatcher.java:298)	at com.oracle.javafx.scenebuilder.kit.library.user.LibraryFolderWatcher.runDiscovery(LibraryFolderWatcher.java:122)	at com.oracle.javafx.scenebuilder.kit.library.user.LibraryFolderWatcher.run(LibraryFolderWatcher.java:88)	at java.lang.Thread.run(Thread.java:744)