java.lang.IllegalArgumentException: Called DataObject.find on null
	at org.openide.loaders.DataObject.find(DataObject.java:441)
	at org.openide.loaders.DataFolder.findFolder(DataFolder.java:486)
	at org.netbeans.modules.project.libraries.LibraryTypeRegistry.<init>(LibraryTypeRegistry.java:34)
	at org.netbeans.modules.project.libraries.LibraryTypeRegistry.getDefault(LibraryTypeRegistry.java:89)
	at org.netbeans.modules.project.libraries.LibrariesStorage.fileDeleted(LibrariesStorage.java:325)
	at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:78)
	at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:764)
	at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:160)
	at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:138)
	at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:91)
	at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:432)
	at org.netbeans.core.projects.ModuleLayeredFileSystem.setURLs(ModuleLayeredFileSystem.java:242)
	at org.netbeans.core.projects.ModuleLayeredFileSystem.removeURLs(ModuleLayeredFileSystem.java:325)
[catch] at org.netbeans.core.modules.NbInstaller.loadLayers(NbInstaller.java:561)
	at org.netbeans.core.modules.NbInstaller.unload(NbInstaller.java:292)
	at org.netbeans.core.modules.ModuleManager.disable(ModuleManager.java:918)
	at org.netbeans.core.ui.ModuleBean$AllModulesBean.doDisable(ModuleBean.java:658)
	at org.netbeans.core.ui.ModuleBean$AllModulesBean.access$800(ModuleBean.java:289)
	at org.netbeans.core.ui.ModuleBean$AllModulesBean$Updater.run(ModuleBean.java:549)
	at org.openide.util.Mutex.writeAccess(Mutex.java:334)
	at org.netbeans.core.ui.ModuleBean$AllModulesBean$Updater.run(ModuleBean.java:489)
	at org.openide.util.Task.run(Task.java:136)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:686)