During secondary validation: Remote PerformValidation RPC failed

[mesbahworld]

My domain is: apps.rak*******.com

I ran this command: sudo certbot certonly --dry-run --nginx -d apps.rakcerambd.com

It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Starting new HTTPS connection (1): acme-staging-v02.api.letsencrypt.org
Simulating a certificate request for apps.rak*******.com
Performing the following challenges:
http-01 challenge for apps.rak*******.com
Using default addresses 80 and [::]:80 ipv6only=on for authentication.
Waiting for verification...
Challenge failed for domain apps.rak*******.com
http-01 challenge for apps.rak*******.com
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

• The following errors were reported by the server:

  Domain: apps.rak*******.com
  Type: serverInternal
  Detail: During secondary validation: Remote PerformValidation RPC
  failed

  Unfortunately, an error on the ACME server prevented you from
  completing authorization. Please try again later.

---

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certbot 1.11.0

nginx version: nginx/1.20.1

[MikeMcQ]

In case you have not yet seen, Let's Encrypt has identified a problem in their staging system. They are actively working to correct it.

And, it may already be corrected

[griffin]

Fixed.