What this means is that when you click on an item, Xcode can’t figure what element it was. Not sure if it’s a bug or not.
In my case I was clicking on a table view cell, and was getting this. The way I got around it was adding these lines:
let cells = app.tables.cells
cells.elementBoundByIndex(0).tap()
Get the reference of the table cells, and for the tap yourself on the view. Of course this is a case by case solution, but it should help you carry on.