W3 Total Cache Error


I installed Wordpress Multisite with EasyEngine. But i getting this error for W3 Total Cache:

Edit file /var/www/site.com/htdocs/nginx.conf and add the following rules above the WordPress directives:
# BEGIN W3TC Browser Cache
gzip on;
gzip_types text/css text/x-component application/x-javascript application/javascript text/javascript text/x-js text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon;
# END W3TC Browser Cache

I checked my nginx config (/etc/nginx/nginx.conf) and it has already this code. I didn’t found another nginx config in /var/www/site.com/htdocs/nginx.conf

Can anyone help me please?