Encountered NPE during XML Remote import

Encountered NPE during import of the PlantCatalog remote XML file example - http://www.w3schools.com/xml/plant_catalog.xml

I think the issue was - I added the Plant child Elements, but left the 'root path' at the document root. However, when I re-tried the scenario - I didnt get the NPE again. Anyway, I am attaching the stacktrace - we may be able to figure out the issue from that.

This may be something we want to address for usability - maybe we can do some validation to ensure that the root path is appropriate for the selected elements?