I checked your site and it seems that the domain is assigned to a hosting account and is pointing to our nameservers, but no DNS records for your domain are published in our nameservers.
This is a known bug on our end that we haven’t been able to fix yet.
But as a workaround, you can remove the domain from your account and then add it again. That will force the system to setup new DNS records for your domain.
Note that this will likely modify which directory on your account your domain is linked to, so you may need to move your files: