./certupdate
About to get TEST certificates for hquest.pro.br
Generating EC keys and CSR…
read EC key
writing EC key
Done
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator dns-rfc2136, Installer None
Performing the following challenges:
dns-01 challenge for hquest.pro.br
dns-01 challenge for hquest.pro.br
Waiting 60 seconds for DNS changes to propagate
Waiting for verification…
Challenge failed for domain hquest.pro.br
Challenge failed for domain hquest.pro.br
dns-01 challenge for hquest.pro.br
dns-01 challenge for hquest.pro.br
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

The following errors were reported by the server:

Domain: hquest.pro.br
Type: dns
Detail: DNS problem: SERVFAIL looking up TXT for
_acme-challenge.hquest.pro.br - the domain’s nameservers may be
malfunctioning

Domain: hquest.pro.br
Type: dns
Detail: DNS problem: SERVFAIL looking up TXT for
_acme-challenge.hquest.pro.br - the domain’s nameservers may be
malfunctioning
Error during dry run, please verify and correct before continuing