how to enable the network in network setup

Hi everybody,

I am at step 3 of this tutorial:

https://codex.www.ads-software.com/Create_A_Network

I am having trouble with:
Add the following to your .htaccess file in /home/content/01/11273901/html/, replacing other WordPress rules:

“RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]”

I tried but it does not seem to work.

Please help.