Important! Add two domain names in the Domains section. The first should be your main domain name, and the second should be your Mavenseed subdomain URL.
So for example if your domain was myballerdomain.com, then you would add myballerydomain.com. ALSO, if your subdomain at Mavenseed is myballerdomain.mavenseed.com, then you would add this as well.
When done you will have (2) domains added here! Your custom domain URL, and your mavenseed subdomain URL.