To all users with the ReadyNAS RN2xx series NAS with transcoder enabled Plex Media Server builds please read this!!
We have noticed that the Firmware 6.6 version brought some under the hood changes that requires some tweaks made to Plex Media Server, so if you are running with this device and want to continue to use Plex Media Server on it, please delay upgrading to Firmware 6.6 just yet. We are working on a fix to make it work on the updated firmware.
Stay tuned!
UPDATE: Plex Pass version of Plex Media Server 1.2.1 has a fix that again makes PMS run on the RN2xx series.