Hi @treasureatuinya, thanks for posting.
You cannot add the "WWW" Cname record because a "WWW" Cname already exists. You can either edit the existing WWW Cname record to Point to the desired setting, or remove it and then add the new one.
But I have done it and the website is not loading. It will throw up a "SERVICE TIMEOUT" at my screen. The link is www.treasuregist.com
I have the same problem as you, but how could you access your site despite having that issue?
Plz, give me detailed steps 'cause I can't access my site.
Thanks in advance.