서브폴더 설치에서 「전체 게시물 보기」 버튼이 작동하지 않음

Yes! All requests from the discourse server are bypassed:

What i’ve noticed is that the embed URL doesn’t have a trailing slash at the end. All urls should have the trailing slash.

So maybe discourse is not following the redirect?

But also, why is it saving the URL without the trailing slash?