Plex is NOT working on my Synology DS1618 since the upgrade of both NAS OS and Plex

[ChuckPa]

Don’t overthink it.

Check the obvious first.

You probably forgot to give the NEW username (System Internal User) PlexMediaServer permission to read.

DSM 7 forced us to change:

1. Plex share → PlexMediaServer
2. Plex user → (System user) PlexMediaServer

Synology FAQ - Questions, Answers, and a few How-To's

FAQ 29 - DSM 7 - Give PlexMediaServer access to your media When you migrate to DSM 7, or are installing a server for the first time, folks forget to read the popup at the end of every installation which tells them about how to set permissions. This FAQ shows in detail how to do what those instructions state. When might you need to perform these steps? When upgrading, changing permissions from Plex to PlexMediaServer is overlooked. Installing Plex for the first time, new installation…