java.lang.NullPointerException
   at javafx.embed.swing.JFXPanel.getInputMethodRequests(JFXPanel.java:858)
   at sun.awt.im.InputMethodAdapter.haveActiveClient(InputMethodAdapter.java:61)
   at sun.awt.windows.WInputMethod.deactivate(WInputMethod.java:340)
   at sun.awt.im.InputContext.deactivateInputMethod(InputContext.java:492)
   at sun.awt.im.InputContext.focusLost(InputContext.java:458)
   at sun.awt.im.InputContext.removeNotify(InputContext.java:627)
   at java.awt.Component.removeNotify(Component.java:7010)
   at java.awt.Container.removeNotify(Container.java:2820)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at javafx.embed.swing.JFXPanel.removeNotify(JFXPanel.java:880)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at org.netbeans.swing.tabcontrol.TabbedContainer.removeNotify(TabbedContainer.java:981)
   at org.netbeans.core.windows.view.ui.tabcontrol.TabbedAdapter.removeNotify(TabbedAdapter.java:336)
   at java.awt.Container.removeNotify(Container.java:2804)
   at javax.swing.JComponent.removeNotify(JComponent.java:4767)
   at java.awt.Container.remove(Container.java:1204)
   at java.awt.Container.remove(Container.java:1262)
   at java.awt.Container.addImpl(Container.java:1096)
   at java.awt.Container.add(Container.java:415)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.setChildren(MultiSplitPane.java:154)
   at org.netbeans.core.windows.view.SplitView.updateSplitPane(SplitView.java:243)
   at org.netbeans.core.windows.view.SplitView.getSplitPane(SplitView.java:156)
   at org.netbeans.core.windows.view.SplitView.getComponent(SplitView.java:107)
   at org.netbeans.core.windows.view.ui.MultiSplitCell.getComponent(MultiSplitCell.java:105)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.collectComponents(MultiSplitPane.java:200)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.setChildren(MultiSplitPane.java:142)
   at org.netbeans.core.windows.view.SplitView.updateSplitPane(SplitView.java:243)
   at org.netbeans.core.windows.view.SplitView.getSplitPane(SplitView.java:156)
   at org.netbeans.core.windows.view.SplitView.getComponent(SplitView.java:107)
   at org.netbeans.core.windows.view.ui.MultiSplitCell.getComponent(MultiSplitCell.java:105)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.collectComponents(MultiSplitPane.java:200)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.setChildren(MultiSplitPane.java:142)
   at org.netbeans.core.windows.view.SplitView.updateSplitPane(SplitView.java:243)
   at org.netbeans.core.windows.view.SplitView.setChildren(SplitView.java:131)
   at org.netbeans.core.windows.view.ViewHierarchy.updateViewForAccessor(ViewHierarchy.java:265)
   at org.netbeans.core.windows.view.ViewHierarchy.updateViewForAccessor(ViewHierarchy.java:255)
   at org.netbeans.core.windows.view.ViewHierarchy.updateViewHierarchy(ViewHierarchy.java:169)
   at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:156)
   at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:275)
   at org.netbeans.core.windows.ViewRequestor.processRequest(ViewRequestor.java:251)
   at org.netbeans.core.windows.ViewRequestor.postRequest(ViewRequestor.java:189)
   at org.netbeans.core.windows.ViewRequestor.scheduleRequest(ViewRequestor.java:127)
   at org.netbeans.core.windows.Central.openGroup(Central.java:1215)
   at org.netbeans.core.windows.TopComponentGroupImpl.open(TopComponentGroupImpl.java:78)
   at org.netbeans.modules.css.visual.CssStylesTCController$2.run(CssStylesTCController.java:156)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)