java.lang.AssertionError: Operation failed: OperationSupport cannot be null because OperationContainer contains elements: [] and invalid elements []
container: org.netbeans.api.autoupdate.OperationContainer@35c50cb5+org.netbeans.modules.autoupdate.services.OperationContainerImpl@5b37686a
java.lang.Exception: Removed all
	at org.netbeans.modules.autoupdate.services.OperationContainerImpl.removeAll(OperationContainerImpl.java:398)
	at org.netbeans.api.autoupdate.OperationContainer.removeAll(OperationContainer.java:377)
	at org.netbeans.modules.autoupdate.ui.Containers.initNotify(Containers.java:74)
	at org.netbeans.modules.autoupdate.ui.PluginManagerUI.postInitComponents(PluginManagerUI.java:524)
	at org.netbeans.modules.autoupdate.ui.PluginManagerUI.access$000(PluginManagerUI.java:79)
	at org.netbeans.modules.autoupdate.ui.PluginManagerUI$1.run(PluginManagerUI.java:133)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcesso
   at org.netbeans.modules.autoupdate.ui.wizards.InstallStep.doDownloadAndVerificationAndInstall(InstallStep.java:216)
   at org.netbeans.modules.autoupdate.ui.wizards.InstallStep.access$200(InstallStep.java:106)
   at org.netbeans.modules.autoupdate.ui.wizards.InstallStep$2.run(InstallStep.java:206)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.doEvaluate(RequestProcessor.java:2085)
   at org.openide.util.RequestProcessor$Task.waitFinished(RequestProcessor.java:1655)
   at org.netbeans.modules.autoupdate.ui.wizards.InstallStep$1.propertyChange(InstallStep.java:187)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at java.awt.Component.firePropertyChange(Component.java:8432)
   at org.netbeans.modules.autoupdate.ui.wizards.OperationPanel.access$200(OperationPanel.java:69)
   at org.netbeans.modules.autoupdate.ui.wizards.OperationPanel$1.run(OperationPanel.java:107)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Operation failed: OperationSupport cannot be null because OperationContainer contains elements: [] and invalid elements []
container: org.netbeans.api.autoupdate.OperationContainer@35c50cb5+org.netbeans.modules.autoupdate.services.OperationContainerImpl@5b37686a
java.lang.Exception: Removed all
	at org.netbeans.modules.autoupdate.services.OperationContainerImpl.removeAll(OperationContainerImpl.java:398)
	at org.netbeans.api.autoupdate.OperationContainer.removeAll(OperationContainer.java:377)
	at org.netbeans.modules.autoupdate.ui.Containers.initNotify(Containers.java:74)
	at org.netbeans.modules.autoupdate.ui.PluginManagerUI.postInitComponents(PluginManagerUI.java:524)
	at org.netbeans.modules.autoupdate.ui.PluginManagerUI.access$000(PluginManagerUI.java:79)
	at org.netbeans.modules.autoupdate.ui.PluginManagerUI$1.run(PluginManagerUI.java:133)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
	at
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:430)
   at org.netbeans.modules.autoupdate.ui.wizards.OperationPanel.addNotify(OperationPanel.java:95)
   at java.awt.Container.addNotify(Container.java:2774)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at javax.swing.JViewport.addNotify(JViewport.java:368)
   at java.awt.Container.addNotify(Container.java:2774)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at java.awt.Container.addNotify(Container.java:2774)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at java.awt.Container.addNotify(Container.java:2774)
   at javax.swing.JComponent.addNotify(JComponent.java:4740)
   at org.netbeans.modules.autoupdate.ui.wizards.PanelBodyContainer.addNotify(PanelBodyContainer.java:109)
   at java.awt.Container.addImpl(Container.java:1120)
   at java.awt.Container.add(Container.java:972)
   at org.netbeans.core.windows.services.NbPresenter.initializeMessage(NbPresenter.java:387)
   at org.netbeans.core.windows.services.NbPresenter.initializePresenter(NbPresenter.java:426)
   at org.netbeans.core.windows.services.NbPresenter.addNotify(NbPresenter.java:454)
   at java.awt.Window.pack(Window.java:804)
   at org.netbeans.core.NotifyExcPanel.update(NotifyExcPanel.java:530)
   at org.netbeans.core.NotifyExcPanel.updateState(NotifyExcPanel.java:411)
   at org.netbeans.core.NotifyExcPanel.access$400(NotifyExcPanel.java:105)
   at org.netbeans.core.NotifyExcPanel$2.run(NotifyExcPanel.java:353)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:220)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:135)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:123)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:119)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:111)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)