XPlay (WebOS)

Hi!
I get error message if I I try change subtitle or audio where is " …(T)" :



I think it is a transcode failure.
Can u help me? If I play it with Plex app then works it fine.
I have LG 42LB670V-ZA tv with webos 1.4.0-2532 (afro-ashley), 05.05.70 software version.

edit: If I change in Settings the playback mode to Transcode —> It doesn’t work. (nothing)