I do not succeed in correct setup. I've tried too to delete

Hi; I do not succeed in correct setup. I've tried too to delete define('DOMAIN_CURRENT_SITE', 'xmodular.net':wink:;
define('PATH_CURRENT_SITE', '/':wink:;
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);
from wp-config as you suggest.

I've an hosting on Namecheap, maybe problem is about hosting:

main WP multisite domain: xmodular.net with dedicated ip: 192.64.112.246

I want to map this domain: sitomobilegratis.com; this domain is registered on Namecheap and DNS are pointed to the same server where main WP domain is hosted, so, both have the same IP 192.64.112.246

To install sitomobilegratis.com I use Cpanel, the same where is installed the main domain, muy be here is the problem; when I create domain on cPanel, I see that automatically it creates also subdomains on main domain, as: sitomobilegratis.com.xmodular.net

I send you some screenshots too.
Best regards