SNI support is disabled:
# grep SNI_SUPPORT /etc/psa/psa.conf
- Website is hosted on shared IP address.
- SSL support is enabled for website, but SSL Cerificates option is missing under Domains > example.com > Hosting Settings.
SNI support is not enabled.
Note: if you don't have administrative access to Plesk via SSH, contact your hosting provider regarding the issue
Connect to the server using SSH.
/etc/psa/psa.conffile and change
SNI_SUPPORTvalue to true:
# service psa restart
- Reload server components under Tools & Settings > Server Components > Refresh.