After upgrading in iredadmin-pro 5.8 I am not able to renew letscript certificates.

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Cannot extract OCSP URI from /etc/letsencrypt/archive/mail.ntsipl.com/cert9.pem
Certificate is due for renewal, auto-renewing...
Renewing an existing certificate for mail.ntsipl.com
Performing the following challenges:
http-01 challenge for mail.ntsipl.com
Waiting for verification...
Challenge failed for domain mail.ntsipl.com
http-01 challenge for mail.ntsipl.com

Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems:
  Domain: mail.ntsipl.com
  Type:   connection
  Detail: 103.239.124.251: Fetching http://mail.ntsipl.com/.well-known/acme … 59Ceg2OFM: Error getting validation data

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.

Cleaning up challenges
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.

Please provide the solution