A couple of days back I found that one of the subdomain sites was down and it was showing DNS_PROBE_FINISHED_NXDOMAIN. The first time, I ignored it because my internet connection is a bit slow that’s why such errors are common to me.
The next day I observed my search console data and I was shocked my all traffic fall down to zero.
At that time I realised the situation and I remembered my domain was showing DNS_PROBE_FINISHED_NXDOMAIN.
I started searching for solutions on google and Youtube But I didn’t find any solution.
On the same day, I also remembered that I added my main domain to Cloudflare at this time I got the main error. While adding my domain to Cloudflare I changed its Nameservers which deleted the subdomain DNS settings.
So I created a new DNS setting by adding TXT, CNAME and MX records.
Within a day my site connected to that domain again.
So If you are facing the same problem then check your DNS records to solve it.
Dont hesitate to express your thought we will look forward to your replies on this.