Nginx test reports warning: nginx: [warn] "ssl_stapling" ignored, no OCSP responder URL in the certificate

Symptoms

• Nginx test command reports the following error:
  

  # nginx -t
  nginx: [warn] "ssl_stapling" ignored, no OCSP responder URL in the certificate "/usr/local/psa/var/certificates/scfh9k6g9bc9ao67tuaZNv"
  nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
  nginx: configuration file /etc/nginx/nginx.conf test is successful

Cause

The OCSP stapling is enabled for the Let`s Encrypt certificate. 
Since May 7, 2025, Let`s Encrypt has removed the OCSP URL from the certificates.
See more information here.

On the Plesk side, created the bug with ID EXTSSLIT-2188. It will be fixed in the future Plesk updates. 

Resolution

Until the bug is fixed, as a workaround, manually disable the OCSP stapling.
For one domain via the Plesk UI. 
Go to Domains > example.com > SSL\TLS Certificates and disable the OCSP stapling:

For one domain via the CLI:

# plesk ext sslit --ocsp-stapling -disable -domain example.com

For all domains via the CLI:

# plesk bin site -l | while read i; do plesk ext sslit --ocsp-stapling -disable -domain $i; done