I’d be grateful if this issue could be raised with Sonos support.
For several months now my Sonos S1 system has been unable to play content from my remote Plex server. The problem may also apply to Sonos S2, but I haven’t tested this. It used to work without any issues.
The symptoms are:
- The Plex server content can be searched from the Sonos apps, and items can be added to the queue without problems.
- When one attempts to play the item(s), playback will immediately fail with ‘the connection to Plex was lost’. This applies to all content.
The issue can be fixed by setting ‘Network > Secure connections’ to ‘Disabled’ on the Plex Server. It then works perfectly. This hints at a problem at the Sonos end, in making secure connections to Plex … but it could be an issue at the Plex end, or a mixture of the two.
This is not a workaround, however, because apart from the security issues it presents, it also breaks remote access from all other Plex clients, which require a secure connection.
Note that this is only an issue with connections to a remote Plex server. There is no issue with either S1 or S2 in connecting to a local Plex server.