Dash Recipe - update datepicker range error

Are the dash recipes still valid? There’s one I’m trying to follow, https://github.com/plotly/dash-recipes/blob/master/dash-update-datepicker-range.py, but i get an error when trying to reference the hidden div.

@jasoncavnar, what is the error?

Btw, I just ran it and had no errors, aside from having to remove Event, which is no longer importable in current version of dash, and some browser console complaints which passed once the page was initialized.