Server Version#: 1.31.3.6868
Player Version#: 8.17
MacOS version 13.3.1
When using the new (default) player, system screensaver starts as if nothing was playing. Switched to the old player, fixed issue. But, i prefer not to use old stuff, i want the new
The version number you gave above indicates that you are actually using the Plex app for mobile Apple devices (i.e. Plex for iOS) on your desktop computer.
While this is technically possible, it is not intended or supported for the Plex app.
Install and use either “Plex for Mac” or “Plex HTPC”.
Download link is below.