TreeView 4.4 in Mendix 7.1 gives error with applyContext

I've configured the simplest possible example of a treeview and I get an error when viewing the console in Chrome:

mxui.js?636284724564508753:formatted:7571 Error: TreeView_widget_TreeView_0.applyContext: Error: TreeView_widget_TreeView_0.applyContext: TypeError: Cannot read property 'set' of undefined

I also get a dialog box indicating I should contact my system administrator. If I misconfigure the widget, I get errors that indicate what I did wrong on the page, but in this case the error message is not helpful.

I've placed the TreeView in a dataview and configured it with the object type of the dataview.

Is this widget intended to work on 7.1.0?  Isn't applyContext deprecated?

I'm using 7.1.0 but selected 7.0.2 for this question as it's the closest I could get when posting this question.