LG WebOS select channel

Taken from this script:
action: media_player.play_media
target:
entity_id: media_player.lg_webos_smart_tv
data:
media_content_id: “3”
media_content_type: channel
metadata: {}

Play 3 on LG webOS Smart TV
Select media player
LG webOS Smart TV

But getting this error:
Media player does not support browsing media.

What am I missing ??