I believe @jprice01 is using a FSE block theme. I’ve run into the same problem with three different plugins, basepress, youzify, wcfm(dashboard page), in conjunction with any FSE block theme.
@codesavory
This includes 2022 theme. Run 2022 and basepress and the header goes away on the knowledgebase pages. /knowledge-base/ has a header but /knowledge-base/demo-content/ aka the inner kb pages do not.
It seems some plugins look for header.php but block themes don’t have that file, nor do they have a footer.php. Since the plugins can’t find header.php, you get no header. You do get the site-title, tagline and maybe logo but that’s it.
If you enable debugging, you get a message that header.php is deprecated. Same with footer.php if it’s called up.
The core devs seem to be working on a fix for backwards compatibility.
core.trac.www.ads-software.com/ticket/55023
There’s a similar issue on github WordPress/gutenberg/issues/33989
As for me, I’m not giving up on FSE block themes because after a few days testing them, I’m hooked. The ability to edit/create headers and footers and use different ones for any given page, create sidebars etc is just the bomb.
That and they’re very fast. I’m getting 99/100 on pagespeed/gtmetrix for most sites now and without a cache plugin. With FSE, I’m able to get rid of several plugins on every site.
For now, visitors to the site running basepress just have to click the site-title to get out of basepress. My client is ok with the kb page not having a header because the site is so much faster now with the block theme.(just makes it look like dedicated a site section LOL)
Another fun thing about FSE themes is that all widgets, including basepress accordion menu, become “legacy widgets” if they’re not blocks so you don’t get a preview in the new widget block editor.
Full Site Editing is technically Beta so welcome to beta testing. Be that as it may, there’s no stopping this move to blocks and block themes so plugin devs are going to have to convert eventually. Might be sooner than later once word spreads that you can score an A on pagespeed/gtmetrix on all but the most plugin laden sites.