How to add shortcode in Upfront?

Hello,

I would like to add a directory shortcode via a widget in upfront, but when I select the text widget I get the error message:

"Oops something has gone wrong with rendering the widget"

"we haven't been able to find any fields for the selected widget".

As part of the issue, I don't know how to add my shortcode to a widget in Appearance > Widget.