Dns_probe_finished_nxdomain

Hello, I am encountering the following error: DNS_PROBE_FINISHED_NXDOMAIN

I am a non-technical person and not able to figure out the issue.

I have a domain name with a Godaddy and VPS with Ovh.

The error does not come from the normal domain name but shows on the subdomain.

How can this be fixed?

Thanks for your help.

Just a quick update: I have solved this by trial and error. Thanks.