java.lang.NullPointerException
   at javafx.embed.swing.JFXPanel.paintComponent(JFXPanel.java:669)
   at javax.swing.JComponent.paint(JComponent.java:1056)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at org.netbeans.swing.tabcontrol.TabbedContainer.paint(TabbedContainer.java:994)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JLayeredPane.paint(JLayeredPane.java:589)
   at javax.swing.JComponent.paintChildren(JComponent.java:889)
   at javax.swing.JComponent.paint(JComponent.java:1065)
   at javax.swing.JComponent.paintToOffscreen(JComponent.java:5228)
   at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1609)
   at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1532)
   at javax.swing.RepaintManager.paint(RepaintManager.java:1302)
   at javax.swing.JComponent._paintImmediately(JComponent.java:5176)
   at javax.swing.JComponent.paintImmediately(JComponent.java:4987)
   at javax.swing.RepaintManager$4.run(RepaintManager.java:846)
   at javax.swing.RepaintManager$4.run(RepaintManager.java:829)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:77)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:829)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:804)
   at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:753)
   at javax.swing.RepaintManager.access$1200(RepaintManager.java:65)
   at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1762)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:759)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:712)
   at java.awt.EventQueue$3.run(EventQueue.java:706)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:77)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:729)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:192)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:106)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:102)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:94)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)