Hi
Embedded error subtitles... (UTF-8)
what is the type of the subtitles?
SRT or PGS in MKV?
I guess SRT because upper right corner of the snapshot - Embedded TX.... and UTF-8 encoding which is the use in MKV ?!?
If that is correct probably you may have error in subtitles like closing tag for italic </i> without opening tag for italic <i> or
may be this is a software error

.
You can extract the subtitles from the movie via mkvtoolnix or eac3to and look at line for time 00:01:48 (approximately from snapshot)
is it opening tag or not.....
I usually use Subtitle Workshop 4 for preprocessing - it clears such errors - will erase the closing tag or put opening tag and
after that I put them into MKV (if needed). In this case - SRT subtitles are external files in my collection.
Regards