I have a Smasung Smart TV 75 inch and 55 inch Model UN55TU700DF and they load the Plex App but when trying to play Video it says unable to read Media files but the Video plays on other Smart TV’s and Mobile Apps.
If your smart TV app has trouble connecting to a Media Server after September 30th, please ensure that both the app and the server are set to allow insecure connections: On the TV app*, ensure that Settings -> Advanced -> Allow Insecure Connections is set to Always, and on the server, ensure that Settings -> Network -> Secure connections is set to Preferred.