AutoSSL Not Auto Renewing

I've been trying to renew an SSL Certificate through AutoSSL and I'm having no luck getting it to work. It has been working previously, but all of the sudden it seems to not be. The error I'm getting when I try to Re-enable AutoSSL for the domain is: 3:14:52 PM WARN The domain "domain.com.au" failed domain control validation: "domain.com.au" does not resolve to any IPv4 addresses on the internet. 3:14:52 PM WARN The domain "www.domain.com.au" failed domain control validation: "www.domain.com.au" does not resolve to any IPv4 addresses on the internet. 3:14:52 PM WARN The domain "mail.domain.com.au" failed domain control validation: "mail.domain.com.au" does not resolve to any IPv4 addresses on the internet.
I've tried the following to fix it: - disable all .htaccess Redirects - update cPanel to the latest version - make sure the DNS Zone's are setup correctly - made sure the domain is resolving to the correct IP address (and it is) - whitelisted comodo's IP addresses in the firewall config So it seems like AutoSSL should work, but it's just not? Any help would be much appreciated.