Right Sidebar Margin with no Widgets

Hello,

I am using Generate Press and GP Premium with the Wordsmith theme. Currently, on all my pages, I have a margin on the right hand side, which I do not want.

Example screenshot:

It seems like this area is reserved for the right sidebar widgets:

However, I have no widgets in the right sidebar, as shown in my WP dashboard:

Notably, removing this div with inspect element does not automatically remove the margin. Where does it come from, and how can I remove it?

Thank you in advance.