CSS to remove nav bar on single page not working

I’m following this article’s (Where to add custom CSS | Beaver Builder Knowledge Base) guidance for how to add this custom CSS (Hide the header nav menu | Beaver Builder Knowledge Base) to remove the nav bar from a single beaver builder page and it’s not working. I’m not sure how to resolve this issue. Any help would be appreciated.

Are you using Beaver Themer for a header that includes your navigation bar? If so, on the edit screen you can add a rule to exclude it from that page. If the header has more than the navigation bar in it and you want something else on that one page, then you can create another layout and put it on that specific page.

Hope that helps. Attached are screen shots. Once you are on the edit screen, look for the Add Exclusion Rule button.