core: Plex on samsung tv, request could not be completed

The problem

Hi

When i use the play media service to play plex content, i always recieve the error below on my samsung tv I have 3 samsung tv’s, the one running Tizen is ok , the 2 ones running Plex App from Orca , those are giving issues

allthough it worked fine, about a year ago, i also tested the plex, reproted a different issue then , see below https://github.com/home-assistant/core/issues/33523#issuecomment-609986934

but since, i didnt use plex anymore, and now want to start using it again the plex app on the samsung tv didnt update

What is version of Home Assistant Core has the issue?

core-2021.3.3

What was the last working version of Home Assistant Core?

107.7 or later

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Plex

Link to integration documentation on our website

https://www.home-assistant.io/integrations/plex/

Example YAML snippet

test_plex:
  alias: 1 TEST Plex
  sequence:
  - service: media_player.play_media
    data:
      entity_id: media_player.plex_plex_for_samsung_tv_ue32h5500
      media_content_type: VIDEO
      media_content_id: "{ \"library_name\": \"Kids\", \"video_name\": \"Cars\" }"

Anything in the logs that might be useful for us?

No errors , even if i enable debug

2021-03-08 20:22:39 DEBUG (SyncWorker_20) [homeassistant.components.plex.media_player] Attempting to play <Movie:4063:Cars> on Plex (Plex for Samsung - TV Samsung)