installing the device-motion plugin.

I see this error in log:
eclipse.buildId=4.4.1.M20140925-0400
java.version=1.7.0_45
java.vendor=Oracle Corporation
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments: -product org.eclipse.epp.package.jee.product -keyring /Users/max/.eclipse_keyring -showlocation
Command-line arguments: -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.jee.product -keyring /Users/max/.eclipse_keyring -showlocation

Error invoking the Node constructor for config model object
Error
Fri Oct 10 14:03:32 CEST 2014
org.eclipse.thym.core

org.eclipse.core.runtime.AssertionFailedException: assertion failed: This operation must be run within the observable's realm
at org.eclipse.core.runtime.Assert.isTrue(Assert.java:110)
at org.eclipse.core.databinding.observable.AbstractObservable.checkRealm(AbstractObservable.java:98)
at org.eclipse.core.databinding.observable.value.AbstractObservableValue.setValue(AbstractObservableValue.java:54)
at org.eclipse.thym.ui.config.internal.EssentialsPage$1.propertyChange(EssentialsPage.java:318)
at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:328)
at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
at org.eclipse.thym.core.config.AbstractConfigObject$Property.setValue(AbstractConfigObject.java:44)
at org.eclipse.thym.core.config.Widget.loadItem(Widget.java:111)
at org.eclipse.thym.core.config.Widget.init(Widget.java:94)
at org.eclipse.thym.core.config.Widget.reload(Widget.java:83)
at org.eclipse.thym.core.config.WidgetModel.reloadEditableWidget(WidgetModel.java:236)
at org.eclipse.thym.core.config.WidgetModel.processPostModelEvent(WidgetModel.java:378)
at org.eclipse.wst.sse.core.internal.model.LifecycleNotificationManager.signalLifecycleEvent(LifecycleNotificationManager.java:114)
at org.eclipse.wst.sse.core.internal.model.AbstractStructuredModel.signalLifecycleEvent(AbstractStructuredModel.java:1501)
at org.eclipse.wst.sse.core.internal.model.AbstractStructuredModel.setDirtyState(AbstractStructuredModel.java:1299)
at org.eclipse.wst.sse.core.internal.FileBufferModelManager$FileBufferMapper.dirtyStateChanged(FileBufferModelManager.java:379)
at org.eclipse.core.internal.filebuffers.TextFileBufferManager$3.run(TextFileBufferManager.java:706)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.filebuffers.TextFileBufferManager.fireDirtyStateChanged(TextFileBufferManager.java:704)
at org.eclipse.core.internal.filebuffers.ResourceFileBuffer.commit(ResourceFileBuffer.java:337)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.saveModel(ModelManagerImpl.java:2054)
at org.eclipse.wst.sse.core.internal.model.AbstractStructuredModel.save(AbstractStructuredModel.java:1149)
at org.eclipse.thym.core.config.WidgetModel.save(WidgetModel.java:245)
at org.eclipse.thym.core.plugin.actions.ConfigXMLUpdateAction.install(ConfigXMLUpdateAction.java:70)
at org.eclipse.thym.core.plugin.PluginInstallActionsRunOperation.run(PluginInstallActionsRunOperation.java:69)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2295)
at org.eclipse.thym.core.plugin.CordovaPluginManager.runActions(CordovaPluginManager.java:632)
at org.eclipse.thym.core.plugin.CordovaPluginManager.doInstallPlugin(CordovaPluginManager.java:309)
at org.eclipse.thym.core.plugin.CordovaPluginManager.installPlugin(CordovaPluginManager.java:159)
at org.eclipse.thym.ui.plugins.internal.CordovaPluginWizard$PluginInstallOperation.execute(CordovaPluginWizard.java:125)
at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:106)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)