I recently updated my Plex Server (HP MS, Xeon E3 1260, 16GB RAM, ESXi Debian VM) to version 18.104.22.16825, web Player version 3.20.7.
Since then I cannot play any off my movies and series on my PC (Win 7) using IE 11).
When I start a movie I get a Playback Error - streaming this media is unsupported. The majority of the movies are MKV created with Handbrake from .TS TV recordings.
Photos are also not working correctly. Some photos in the same library are shown some don't.
When I play them on my Samsung TV Client Version 2.009 the movies play fine.
On the Samsung TV though I had to configure the Client to use the local Viewer for Pictures to be enable to see all my photos displayed.
Here is another threat with similar symthomps,
I appreciate every hint that can help me Fixing the issues.