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
Exactly the same situation just happend to me. Clean VPS installation on ovh. First thing upgrade from default Plesk 12 to Plesk Onyx. Connection refused, plesk repair was showing everything OK. Removing ssl.conf was solution.