Sidebar misbehaving on MH Magazine theme

Hi, everybody-

Been having some trouble enabling the forum sidebar. My theme (MH Magazine) has no bbPress template by default, so I copied my full-page-width template and renamed it plugin-bbpress.php. I’ve got the forums page set to this template, selected it in the WP Tweaks options, but something has gone awry between the template and the forum sidebar (and yes, I’ve loaded it with widgets).

I can dig into the PHP file and mess around if need be… just not sure whether or how…

https://www.blackshipbooks.com/forums/

https://www.ads-software.com/plugins/bbpress-wp-tweaks/