java.lang.NullPointerException
   at org.netbeans.modules.css.refactoring.CssRefactoringPluginFactory.createInstance(CssRefactoringPluginFactory.java:66)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.getPlugins(AbstractRefactoring.java:140)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.addProgressListener(AbstractRefactoring.java:281)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel.showDialog(ParametersPanel.java:471)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.refresh(RefactoringPanel.java:575)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.<init>(RefactoringPanel.java:137)
   at org.netbeans.modules.refactoring.spi.ui.UI.openRefactoringUI(UI.java:86)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider$TextComponentTask.run(RefactoringActionsProvider.java:751)
   at org.netbeans.modules.refactoring.java.RetoucheUtils.invokeAfterScanFinished(RetoucheUtils.java:962)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider.doRename(RefactoringActionsProvider.java:197)
   at org.netbeans.modules.refactoring.api.impl.ActionsImplementationFactory.doRename(ActionsImplementationFactory.java:86)
   at org.netbeans.modules.refactoring.spi.impl.RenameAction.performAction(RenameAction.java:65)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringGlobalAction$ContextAction.actionPerformed(RefactoringGlobalAction.java:181)
   at org.netbeans.modules.java.editor.rename.InstantRenamePerformer.doFullRename(InstantRenamePerformer.java:236)
   at org.netbeans.modules.java.editor.rename.InstantRenamePerformer.invokeInstantRename(InstantRenamePerformer.java:219)
   at org.netbeans.modules.java.editor.rename.InstantRenameAction.actionPerformed(InstantRenameAction.java:62)
   at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:339)
   at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1664)
   at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
   at javax.swing.JComponent.processKeyBindings(JComponent.java:2886)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
   at java.awt.Component.processEvent(Component.java:5885)
   at java.awt.Container.processEvent(Container.java:2105)
   at java.awt.Component.dispatchEventImpl(Component.java:4469)
   at java.awt.Container.dispatchEventImpl(Container.java:2163)
   at java.awt.Component.dispatchEvent(Component.java:4295)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1881)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:749)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1025)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:892)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:713)
   at java.awt.Component.dispatchEventImpl(Component.java:4339)
   at java.awt.Container.dispatchEventImpl(Container.java:2163)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4295)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)