This error happens because Plex.tv still thinks there is a DSM 6 installation.
When you DELETE (uninstall & erase) without also deleting it from Plex.tv, plex.tv gets hung up looking for that DSM 6 installation at that IP address.
The answer here is:
-
Uninstall the DSM 7 Plex app
-
Reinstall the same SPK – EXCEPT
– Choose the “New or Lost servers” button
– Click “Get Plex Claim Token” link
– COPY the claim token from the browser tab which opens
– Return to the installer tab and PASTE the claim token into the box
– Click NEXT - NEXT - DONE -
It will take a bit longer to install (it’s getting and installing new credentials)
-
When complete
– It will tell you if the installation itself succeeded (normally this is the case)
– It will also confirm ownership and show your Plex Username and Email address.
The full procedure is here (with screenshots)
- After the server is claimed (added to your account again), Plex.tv will automatically update and it will no longer get confused / looking for DSM 6
Once claimed and you have control,
- Give the new username “PlexMediaServer” (“Plex” isn’t used anymore in DSM7)
- Start adding your media
EDIT:
I see there were 8 abandoned servers on Plex.tv from 4+ years ago
(Not connected to Plex in that time or longer)
I removed them for you to clean things up
