Looks like a javascript issue. Anyone else having trouble cloning a snapshot on 4.1.6?
2017-10-30 11:03:27,502-04 ERROR [org.ovirt.engine.ui.frontend.server.gwt.OvirtRemoteLoggingService] (default task-23) [] Uncaught exception: com.google.gwt.core.client.JavaScriptException: (TypeError)
__gwt$exception: <skipped>: Cannot read property 'R' of null
at org.ovirt.engine.ui.uicommonweb.models.vms.UnitVmModel.$isHostedEngine(UnitVmModel.java:1888)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget.$edit(AbstractVmPopupWidget.java:1515)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget.edit(AbstractVmPopupWidget.java:1515)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractVmPopupWidget.edit(AbstractVmPopupWidget.java:1515)
at org.ovirt.engine.ui.common.widget.uicommon.popup.AbstractModeSwitchingPopupWidget.edit(AbstractModeSwitchingPopupWidget.java:78)
at org.ovirt.engine.ui.common.view.popup.AbstractModelBoundWidgetPopupView.$edit(AbstractModelBoundWidgetPopupView.java:36)
at org.ovirt.engine.ui.common.view.popup.AbstractModelBoundWidgetPopupView.edit(AbstractModelBoundWidgetPopupView.java:36)
at org.ovirt.engine.ui.common.presenter.AbstractModelBoundPopupPresenterWidget.$init(AbstractModelBoundPopupPresenterWidget.java:143)
at org.ovirt.engine.ui.common.widget.popup.AbstractVmBasedPopupPresenterWidget.$init(AbstractVmBasedPopupPresenterWidget.java:68)
at org.ovirt.engine.ui.common.widget.popup.AbstractVmBasedPopupPresenterWidget.init(AbstractVmBasedPopupPresenterWidget.java:68)
at org.ovirt.engine.ui.common.widget.popup.AbstractVmBasedPopupPresenterWidget.init(AbstractVmBasedPopupPresenterWidget.java:68)
at org.ovirt.engine.ui.common.uicommon.model.ModelBoundPopupHandler.$handleWindowModelChange(ModelBoundPopupHandler.java:96)
at org.ovirt.engine.ui.common.uicommon.model.ModelBoundPopupHandler$1.$eventRaised(ModelBoundPopupHandler.java:77)
at org.ovirt.engine.ui.common.uicommon.model.ModelBoundPopupHandler$1.eventRaised(ModelBoundPopupHandler.java:77)
at org.ovirt.engine.ui.uicompat.Event.$raise(Event.java:99)
at org.ovirt.engine.ui.uicommonweb.models.Model.$onPropertyChanged(Model.java:471)
at org.ovirt.engine.ui.uicommonweb.models.Model.onPropertyChanged(Model.java:471)
at org.ovirt.engine.ui.uicommonweb.models.Model.$setWindow(Model.java:93)
at org.ovirt.engine.ui.uicommonweb.models.vms.VmSnapshotListModel.$cloneVM(VmSnapshotListModel.java:703)
at org.ovirt.engine.ui.uicommonweb.models.vms.VmSnapshotListModel.executeCommand(VmSnapshotListModel.java:912)
at org.ovirt.engine.ui.uicommonweb.UICommand.$execute(UICommand.java:163)
at org.ovirt.engine.ui.common.widget.action.UiCommandButtonDefinition.$onClick(UiCommandButtonDefinition.java:130)
at org.ovirt.engine.ui.common.widget.action.UiCommandButtonDefinition.onClick(UiCommandButtonDefinition.java:130)
at org.ovirt.engine.ui.common.widget.action.AbstractActionPanel$11.execute(AbstractActionPanel.java:575)
at com.google.gwt.user.client.ui.MenuBar$1.execute(MenuBar.java:893) [gwt-servlet.jar:]
at com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:164) [gwt-servlet.jar:]
at com.google.gwt.core.client.impl.SchedulerImpl.$flushFinallyCommands(SchedulerImpl.java:270) [gwt-servlet.jar:]
at com.google.gwt.core.client.impl.Impl.exit(Impl.java:378) [gwt-servlet.jar:]
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:335) [gwt-servlet.jar:]
at Unknown.eval(webadmin-0.js@54)