I got the message in server : Severity Level Date Time Users Source IP Application Category Content Error 2020/09/07 05:11:40 System 127.0.0.1 --- --- WARNING: Could not create PlexData share. Further assistance is available in our Support Forums. Cont

Plex Media Server
2

This is nothing to worry about.

In PMS 1.20.1, when installing, I create the PlexData share if it doesn’t exist.

On some QNAP systems, creation fails. I’ve not been able to determine why so have made changes in the upcoming 1.20.2.

As of 1.20.2,

  1. The installer will not attempt to create it.
  2. If you wish to use the feature, manually creating the share yourself will enable it.

The full FAQ is here.