Plex on Amazon Fire TV doesn't play MKV
I installed the Plex-Server on my Sinology DS212j-NAS and a amazon Fire TV in order to watch my media on TV.
Thing is, it will *only* play .mp4-files. When trying to play another format (i.e. .mkv) I get the following error-message: "It is not possible to play this video as no connection to the required Server could be found."
I am far from being an IT-expert, but to me this error-message doesn't make sense as the connection to the server is definetly established. So I guess there is another problem with respect to the file-format...
Confusingly (or not??), any file is being played without problem on my mac via the "Plex home theater"-app from the same source (Sinology-NAS).
Having made lots of research with no result, I am getting impatient as I would love to get Plex to work. You may be my last resort of help!
I hope that this pretty basic information is sufficient. Thanks in advance!