No valid IP address found for domain when trying to get SSL certificate?

As I was following the tutorial found here: in order to get my SSL certificate. On step 4 I am asked to run the following command sudo certbot --nginx -d -d with my domains which are working, I keep getting the following error: No valid IP addresses found for m**.ca (my domain)**. I waited the 48 hours as instructed by Google domains after changing name servers and keep getting the same issue.

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Is it really domain ? I tried few whois lookup web sites and got the same result - domain has not got an owner. In such case, there is no chance to get a certificate for it. But, if you put just as an example of your domain, then find out what says when you enter your actual domain there.

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