I want to make a homepage that uses XenForo under https://domain.com. But how and where must XenForo be when I want to do it? In var/www/html/forum or var/www/html/ ?
If the home page is part of XF - a page node, add-on, etc. - then XF must be installed in the domain root.
If the home page is external to XF - WordPress, or a static HTML page for example - then XF should be installed in a sub directory such as /forum or /community.
uh, ok. then put back '/forum' from Board URL .
next you have to add "node" that is a page. Admin control panel -> Forums -> Nodes -> add node ->Node type : Page.