You need to update the theme – https://xstore.helpscoutdocs.com/article/63-theme-update and then Core plugin – https://xstore.helpscoutdocs.com/article/37-plugins-update (do not update the Core before the theme update).
I’ve created “Footer marseill02” static block on your site. You can edit it depends on your needs.
To set the block as a footer for all pages, go to Appearance > Widgets > Footer area, to set it for 1 page only, edit page > [8theme] Layout options > Use custom footer for this page/post
Regards