Content Page Include not working

I have this structure:

index.html
views/partials/_something.html
views/partials/_partialForSomething.html

When I add a Content Page Include on _something.html and point it to _partialForSomething.html I see this in the code:

_something.html:

<link rel="wappler-include" type="content-page" href="_partialForSomething.html">

But nothing is rendering. Is that supported on BS4 web projects? I’m working on a PWA, and trying to see if I can stick to .html files without needing to render server side (without needing .ejs files).

I also thought perhaps that only loads the partial html and caches it, and I need another element as a target, but can’t find any way to display it, so I’m assuming the link element is replaced with the actual content.