I am trying to add Plex as a music service on Sonos, using my iOS Sonos controller app. As I go through the steps, I get to one that says "Please use the following code to authorize your account: XXXX" Instead of "XXXX" it gives me a unique code each time I try the setup. Presumably I am supposed to take the code and go to my Plex app or server and authorize my Sonos account to access my Plex server library. But I don't find any place to enter this code in Plex.
I am still relatively new to Plex and perhaps I am overlooking something obvious. Can someone please give me idiot-proof steps to authorize my Sonos account?
Plex Media Server Version 0.9.15.2.1663-7efd046 is running on my Mac Pro with OSX 10.7.5.
Plex Web with Firefox 48.0.2
Sonos Controller for iPhone version 6.4.8
Sonos Play 5 firmware version 6.4.2