LG C9 TV: Conversion failed. The transcoder exited due to an error happening occasionally

This is the problem handled in this thread here. Thanks for speaking up, I’m glad that a few more people confirm the issue. Could you please share your details, e.g. server version, TV model, etc?

This is a separate problem, see for example that thread: Conversion failed playback error when subtitles are over (usually at the end)