Can’t see home page in Subdirectory sites

Tried enabling multisite with this info in test site:

https://journalxtra.com/websiteadvice/wordpress/how-to-force-multi-site-to-use-subdirectories-2427/

It worked. The problem I am having is that on my added Subdirectory sites, i can’t see the home page. The browser only shows me the folder with cgi-bin in it.

https://www.dominiclamoureux.com/forum/

When i enter a page address or post i have created in the new site.. I see the page…

https://www.dominiclamoureux.com/forum/2012/05/14/hhh/

So my only problem is i can’t see home page in sites i add.

Any idea?

Thank you ??