Live TV and Firestick playback

When trying to playback live tv on a firestick, I get a black screen with spinning wheel… like buffering… then the plex app closes.

This was working for me at one point, and now after some version changes… not sure which, because both the firesticks and plex are on autoupdate. I am able to play live tv on my appleTV and chrome browser without incident.

Any ideas?