DNS_PROBE_FINISHED_NXDOMAIN on fresh installation Virtualmin Centos 7

Hi guys!

I need some help here, I installed Virtualmin on CentOs 7 minimal, no errors on install only a warning about quotas.

First thing I notice when I try to log in https://ns1.mysite.com:10000 is the error "DNS_PROBE_FINISHED_NXDOMAIN", I used Chrome and then test on Firefox with the same result.

If I try https://myserveripaddress:10000 I can log in and can proceed wit the Post-Installation Wizard, but in the "DNS Zone" configuration I get the message: "Primary nameserver cannot be resolved from the rest of the Internet : Host ns1.mydomain.com not found: 3(NXDOMAIN)".

If I skip the test I can finish the configuration, but I dont know if there may be future errors related to this issue.

Thanks for your time.