WordPress Multisite problem with displaying created sites

I copied manually files from /public_html folder to /public_html/usa,
/public_html/fra/, /public_html/ukr, /public_html/rus

It seem to work for sies https://rus.nazarserdyuk.com/ and https://fra.nazarserdyuk.com/ but for sites https://usa.nazarserdyuk.com/ and https://ukr.nazarserdyuk.com/ it does not work they redirect for some reason to https://nazarserdyuk.com even that in redirection settings it is setted not redirected

I choosed to reinstall wordpress and proceed with steps in manual again.

When I go to Tools->Network Setup I got this message:

“Because your install is not new, the sites in your WordPress network must use sub-domains. The main site in a sub-directory install will need to use a modified permalink structure, potentially breaking existing links.”

How could this be possible if I just installed wordpress? I want to use sub-directories in my wordpress multisite network