How to add widgets to Upfront/Spirit

I want to add a widget. I download a widget and go to Upfront/Spirit and drag Widget onto the page, which then says "Please select widget in settings"
presumably this means wp-admin > Appearance > Widgets where it says
"To make use of your widgets, add Widget element to your layouts. You can do so here"
When I click "here" I get this error message
"Ooops, something seems to have gone wrong with rendering the widget
This message will not be shown to your visitors"
Thank you