Hello,
I am running 4.2.6 and I can't seem to clone a snapshot of vm when it's running, when I click the clone button it gives an
Uncaught exception occurred. Please try reloading the page. Details: Exception caught: (TypeError) : Cannot read property 'K' of null
Please have your administrator check the UI logs

in the UI logs I have

2018-09-11 12:09:11,001+01 ERROR [org.ovirt.engine.ui.frontend.server.gwt.OvirtRemoteLoggingService] (default task-4854) [] Permutation name: 5F972F481E93244BA7B05ED4E850EBA2
2018-09-11 12:09:11,002+01 ERROR [org.ovirt.engine.ui.frontend.server.gwt.OvirtRemoteLoggingService] (default task-4854) [] Uncaught exception: com.google.gwt.event.shared.UmbrellaException: Exception caught: (TypeError) : Cannot read property 'K' of null
at java.lang.Throwable.Throwable(Throwable.java:70) [rt.jar:1.8.0_181]
at java.lang.RuntimeException.RuntimeException(RuntimeException.java:32) [rt.jar:1.8.0_181]
at com.google.web.bindery.event.shared.UmbrellaException.UmbrellaException(UmbrellaException.java:64) [gwt-servlet.jar:]
at com.google.gwt.event.shared.UmbrellaException.UmbrellaException(UmbrellaException.java:25) [gwt-servlet.jar:]
at com.google.gwt.event.shared.HandlerManager.$fireEvent(HandlerManager.java:117) [gwt-servlet.jar:]
at com.google.gwt.user.client.ui.Widget.$fireEvent(Widget.java:127) [gwt-servlet.jar:]
at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:127) [gwt-servlet.jar:]
at com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:110) [gwt-servlet.jar:]
at com.google.gwt.user.client.ui.Widget.$onBrowserEvent(Widget.java:163) [gwt-servlet.jar:]
at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:163) [gwt-servlet.jar:]
at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1415) [gwt-servlet.jar:]
at com.google.gwt.user.client.impl.DOMImplStandard.dispatchEvent(DOMImplStandard.java:312) [gwt-servlet.jar:]
at com.google.gwt.core.client.impl.Impl.apply(Impl.java:236) [gwt-servlet.jar:]
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:275) [gwt-servlet.jar:]
at Unknown.eval(webadmin-0.js)
Caused by: com.google.gwt.core.client.JavaScriptException: (TypeError) : Cannot read property 'K' of null
at org.ovirt.engine.ui.uicommonweb.models.vms.ExistingVmModelBehavior.updateHaAvailability(ExistingVmModelBehavior.java:481)
at org.ovirt.engine.ui.uicommonweb.models.vms.UnitVmModel.eventRaised(UnitVmModel.java:1933)
at org.ovirt.engine.ui.uicompat.Event.$raise(Event.java:99)
at org.ovirt.engine.ui.uicommonweb.models.ListModel.$setSelectedItem(ListModel.java:82)
at org.ovirt.engine.ui.uicommonweb.models.ListModel.setSelectedItem(ListModel.java:78)
at org.ovirt.engine.ui.common.editor.UiCommonEditorVisitor.$updateListEditor(UiCommonEditorVisitor.java:193)
at org.ovirt.engine.ui.common.editor.UiCommonEditorVisitor.visit(UiCommonEditorVisitor.java:47)
at com.google.gwt.editor.client.impl.AbstractEditorContext.$traverse(AbstractEditorContext.java:127) [gwt-servlet.jar:]
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget_UiCommonModelEditorDelegate.accept(AbstractVmPopupWidget_UiCommonModelEditorDelegate.java:502)
at com.google.gwt.editor.client.impl.AbstractEditorContext.$traverse(AbstractEditorContext.java:127) [gwt-servlet.jar:]
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget_DriverImpl.accept(AbstractVmPopupWidget_DriverImpl.java:4)
at org.ovirt.engine.ui.common.editor.AbstractUiCommonModelEditorDriver.$edit(AbstractUiCommonModelEditorDriver.java:32)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget.$edit(AbstractVmPopupWidget.java:1518)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget.edit(AbstractVmPopupWidget.java:1518)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget.edit(AbstractVmPopupWidget.java:1518)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractModeSwitchingPopupWidget.edit(AbstractModeSwitchingPopupWidget.java:80)
at org.ovirt.engine.ui.common.view.popup.AbstractModelBoundWidgetPopupView.edit(AbstractModelBoundWidgetPopupView.java:37)
at org.ovirt.engine.ui.common.presenter.AbstractModelBoundPopupPresenterWidget.$init(AbstractModelBoundPopupPresenterWidget.java:105)
at org.ovirt.engine.ui.common.widget.popup.AbstractVmBasedPopupPresenterWidget.$init(AbstractVmBasedPopupPresenterWidget.java:63)
at org.ovirt.engine.ui.common.widget.popup.AbstractVmBasedPopupPresenterWidget.init(AbstractVmBasedPopupPresenterWidget.java:63)
at org.ovirt.engine.ui.common.widget.popup.AbstractVmBasedPopupPresenterWidget.init(AbstractVmBasedPopupPresenterWidget.java:63)
at org.ovirt.engine.ui.common.uicommon.model.ModelBoundPopupHandler.$handleWindowModelChange(ModelBoundPopupHandler.java:116)
at org.ovirt.engine.ui.common.uicommon.model.ModelBoundPopupHandler.$lambda$0(ModelBoundPopupHandler.java:80)
at org.ovirt.engine.ui.common.uicommon.model.ModelBoundPopupHandler$lambda$0$Type.eventRaised(ModelBoundPopupHandler.java:80)
at org.ovirt.engine.ui.uicompat.Event.$raise(Event.java:99)
at org.ovirt.engine.ui.uicommonweb.models.Model.$onPropertyChanged(Model.java:470)
at org.ovirt.engine.ui.uicommonweb.models.Model.onPropertyChanged(Model.java:470)
at org.ovirt.engine.ui.uicommonweb.models.Model.$setWindow(Model.java:99)
at org.ovirt.engine.ui.uicommonweb.models.vms.VmSnapshotListModel.$cloneVM(VmSnapshotListModel.java:652)
at org.ovirt.engine.ui.uicommonweb.models.vms.VmSnapshotListModel.executeCommand(VmSnapshotListModel.java:798)
at org.ovirt.engine.ui.uicommonweb.UICommand.$execute(UICommand.java:163)
at org.ovirt.engine.ui.common.widget.action.UiCommandButtonDefinition.onClick(UiCommandButtonDefinition.java:125)
at org.ovirt.engine.ui.common.presenter.ActionPanelPresenterWidget.$lambda$2(ActionPanelPresenterWidget.java:140)
at org.ovirt.engine.ui.common.presenter.ActionPanelPresenterWidget$lambda$2$Type.onClick(ActionPanelPresenterWidget.java:140)
at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:55) [gwt-servlet.jar:]
at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:76) [gwt-servlet.jar:]
at com.google.web.bindery.event.shared.SimpleEventBus.$doFire(SimpleEventBus.java:173) [gwt-servlet.jar:]
... 11 more

Regards,
Paul S.
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