Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread: CentOS2Alma discussion
You can check with openssl what domain is causing it:
openssl x509 -in /opt/psa/var/certificates/scfWkDlPC -text -noout
And then try to temp remove the SSL for that domain, if nginx starts then you can renew the SSL to a new one
Debian 8, is already more than EOL and not supported:
https://docs.plesk.com/release-notes/obsidian/software-requirements/#s2-1
Please migrate to a supported, up-to-date OS:
https://support.plesk.com/hc/en-us/articles/12377889325719-Plesk-Migration-and-Transfer-Guide
Either check logs and provide more detailed information, or contact the support team.
Check the Apache and Nginx logs ones at first:
https://support.plesk.com/hc/en-us/articles/12377744787991-Plesk-for-Linux-services-logs-and-configuration-files#apache
To sign in to support, please go to...
I suspect you trying to install a wildcard SSL, that needs a DNS entry for validation.
If your DNS is managed externally then you need to add the entry manually there and wait for it to propagate.
Or use a SSL without wildcard option
Seems some other installer process running, you can try to stop them with:
plesk installer stop
https://support.plesk.com/hc/en-us/articles/12377858950295-Unable-to-open-the-Updates-and-Upgrades-page-or-start-Plesk-Installer-in-CLI-Update-operation-was-locked-by-another-update-process
Not sure if anything changed for that installation, but about the command if you're using chroot SSH access, then you might need to add the command first to it:
https://support.plesk.com/hc/en-us/articles/12377962235159