Problem with playback (following Read First above)
Like a lot of people, I've been having problems with playback using Plex on the ROKU. At first I thought it must be a ROKU issue but I'm pretty sure it might be a PLEX issue (at least for me).
I've been running Plex successfully on my ROKU 2XS on the ROKU 7.7 build 4135-02 since August. I still have that same ROKU firmware. On Monday Sept. 25, I was able to watch Plex videos with no issue. On Tuesday 9/26 Plex would run for a minute or two and stop. I'd either be sent to the ROKU home screen or the ROKU would completely reset. I've tried at least 6 other videos with the same result.
I am running PMS 18.104.22.16885 and App version 5.0 build 1 (which was updated for me on 9/26). I'm attaching the requested files. Hopefully it will help you eliminate this bug.