Certbot failed to authenticate some domains (authenticator: apache). The Certificate Authority reported these problems:
Domain: www.gpjhansi.org
Type: dns
Detail: DNS problem: SERVFAIL looking up CAA for gpjhansi.org - the domain's nameservers may be malfunctioning
Hint: The Certificate Authority failed to verify the temporary Apache configuration changes made by Certbot. Ensure that the listed domains point to this Apache server and that it is accessible from the internet.
Hi @deepak2910, and welcome to the LE community forum 
We've seen CAA problems with DO in the past:
gpjhansi.org nameserver = ns1.digitalocean.com
gpjhansi.org nameserver = ns2.digitalocean.com
gpjhansi.org nameserver = ns3.digitalocean.com
They usually don't last for very long...
LD doesn't seem to find any trouble [at this time]:
Let's Debug (letsdebug.net)
Try it again with staging first:
certbot certonly -d gpjhansi.org -d www.gpjhansi.org --dry-run
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