The index of a domain redirects to the main domain of multisite

Hello!

I have a problem. The plugin works great, but when you create another domain, the main page it redirects to the main (where the WP was installed).

Example:
The site "aaa.com" hosts the WordPress multisite. The "bbb.com" site functions successfully least homepage. The administration panel works and subpages "bbb.com/subpage" too. However, "bbb.com" redirects to "aaa.com".

How you could solve this little problem? Is an error with the DNS or WP?

Thank you very much for the help,
A greeting :slight_smile: