I just set up a new website with only WPFORO content. (Wordpress+Akismet+Wpforo - no other plugins available.)

What I want to do: When I say use WPFORO as a site-wide forum, it opens in full width. (Borads>Turn WordPress to wpForo) In this state, a bad image is formed on the desktop.

So I turn this option off and use the [wpforo] code on the homepage.

When I set the page with this code to Settings > Reading > Home Page, my website crashes and no pages are opened. All URLs return to home page.

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I have an old website with the same settings and it works fine.

How can I fix this problem? Please help me.

or

How can I adjust the width when I want to spread the forum across the site?