• The BIND DNS server has already been deprecated and removed from Plesk for Windows.
    If a Plesk for Windows server is still using BIND, the upgrade to Plesk Obsidian 18.0.70 will be unavailable until the administrator switches the DNS server to Microsoft DNS. We strongly recommend transitioning to Microsoft DNS within the next 6 weeks, before the Plesk 18.0.70 release.
  • The Horde component is removed from Plesk Installer. We recommend switching to another webmail software supported in Plesk.

Issue ssl client

You need to set the php settings in that location. Once that location is matched, the other location that handles PHP requests is no longer matched thus any PHP file in /secure will be treated like a plain txt file, exposing the php source rather the generated output.
You could enable Proxy Mode and set PHP requests to ve handled by Apache. Then in the /secure location proxy the requests to the Apache port.
 
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