In this theme, you have to select one layout for all static pages, and I have chosen a layout that is full page. You don’t get Template options while creating/editing a page. Is that causing the issue? It seems all of the other “sidebar” plugins I’ve tried simply replace an existing sidebar, they won’t add one. Is “bbPress WP Tweaks” the same, or can you add a sidebar to the forum page even if it doesn’t have a sidebar originally?