Hello! Having some trouble with sharing my Plex Library with a friend. All of the videos on my server play just fine on my laptop, my phone, my friend's phone, and through Rabb.it. When my friend tries to play videos on a very similar computer, and on their Plex app on their Xbox One, they do not play. The videos in question are contained in MKV. Both computers involved are running recent versions of Mac OS and were attempted in multiple browsers. My friend was able to get some AVI and MP4 videos playing on their computer, which leads me to believe that MKV is somehow at fault. I've attached logs.
Why would MKVs on my server cause them issues when they are able to use MKVs from their own server with no problems? Are there further things I can do to help diagnose the issue? I would like to give them one of the MKV files and see if they can run it off their own server, but have not gotten to do this yet.
Thanks for any assistance you can provide!