media library and customize not show nothing

I’m trying to create a wordpress multisite – multi-network (sub folders) with the WP Multi-Network plugin, and I follow the instructions to achieve the folder paths (with this tutorial)

like so:

main site (main domain) >> country1 sub network (with domain) >> city1 sub network >> subsites x.

when I modify the htaccess in the line

RewriteRule  ^([_0-9a-zA-Z-]+/)?(wp-.*) $2 [L]
to
Rewrite rule ^(.+)?/(wp-.*) /$2 [L]

the media and wordpress customization options of the >> city 1 subnet and the >> x subsites are not shown.

Can you help me? please