TV stopped playing videos

My Smart TV has recently stopped working with Plex via DLNA. I’ve attached the 2 logs after enabling debug logging, and restarting the server. I then recreated the issue on the TV and have attached the logs. When I select a show to play on the TV it attempts to start playback and almost instantly flips me back to the video listings (failing to play video).
Apr 08, 2017 14:56:07.419 [3172] DEBUG - Codecs: testing aac_mf (decoder)
Apr 08, 2017 14:56:07.419 [3172] WARN - Failed to find decoder ‘aac_mf’
Apr 08, 2017 14:56:07.420 [3172] DEBUG - MDE: received PLEX_PROTOCOL_ANY from client, selected protocol http
Apr 08, 2017 14:56:07.420 [3172] DEBUG - MDE: analyzing media item 12787
Apr 08, 2017 14:56:07.420 [3172] DEBUG - MDE: E9 - Dead in the Water: no direct play video profile exists for http/mkv/h264
Apr 08, 2017 14:56:07.420 [3172] DEBUG - MDE: E9 - Dead in the Water: no direct play video profile exists for http/mkv/h264/aac
Thanks in advance for the help!

Sharp Aquos, was working fine. recently has stopped playing videos…
I’ve attached the logs here:

I could play MKV files no problem up until my plex server updated? how can I downgrade plex media server? I would like to go back to previous version (or 2).