➜ ~ certbot --nginx -d **************
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requesting a certificate for brother-test.oa3.qingtingai.net
Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
Domain: brother-test.oa3.qingtingai.net
Type: connection
Detail: During secondary validation: Fetching http://***************/.well-known/acme-challenge/3MkT_uf1xIi3CHEI_FNuhrJdHjquhq1fegBcFPkGSd4: Connection reset by peer
Hint: The Certificate Authority failed to verify the temporary nginx configuration changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible from the internet.
Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.