How to setup wordpress multisite?

I use cyberpanel and openlitespeed in an ubuntu server.
I am trying to install a wordpress multisite the easy way: I use the folder setup instead of the subdomain.
I tried the .htaccess in the setup but it returns a lot of "too many redirects".
I tried all the .htaccess that I see in forums for this topic but none of them works.

I have disabled all plugins, this is a fresh install and I restart openlitespeed after all changes in the htaccess.

Any idea of the correct htaccess?
Ok, I found the issue.

I had some custom headers in the context

I removed this and now it looks there is no more 302 redirects

Hope this help others