Doesn't work for TreeGrid - Vaadin 8.1.6: throws java.lang.UnsupportedOper

Directory Excel Exporter
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Doesn’t work for TreeGrid - Vaadin 8.1.6: throws
java.lang.UnsupportedOperationException: dataProvider class com.vaadin.data.provider.TreeDataProvider of grid is not supported

Are there any updates to this add-on? Did anyone find any alternatives?