Page menu on MODX Revo?

Question

MODX

Good Evening
There is a page of the site mirada-spb.ru/sada that redirects to the 404 page, and everything is correct. But here the left MENU of the site automatically disappears, I would like to set the menu as on the main page, how to do this in MODX Revo?
Thank you for your attention)

Answer 1

It's not a menu, it's a submenu. The 404 error page has no subsections, so it's empty.