My primary domain is primary.com and I added an alias domain for it alias.com, I also added subdomain sub.primary.com and install SSL certificate to it .. Until this point every thing works well.

The issue is that when I request to visit the subdomain using the primary name sub.primary.com the SSL works well, But If I request it using the alias name sub.alias.com the browser gives an SSL certificate error

Certificate is not valid

This server could not prove that it is sub.alias.com; its security certificate is from sub.primary.com. This may be caused by a misconfiguration or an attacker intercepting your connection.

I deleted all the codes that causing the redirection, So now there is not any code on any domain.

So .. What is the reason that makes the SSL certificate not work with pos.orders.ly