Hi @GP1710 your Tv should certainly be compatible and I assume you have the latest firmware.
You could try is rebooting the router by unplugging from mains , are other streaming services are ok and is there any difference with Beta version? Troubleshooting guide here: obviously you may need to contact the BBC and /or Samsung though. on occasions it in the past it was an issue with the server at Samsung's end https://www.bbc.co.uk/iplayer/help/questions/smart-tv-and-games-console-issues/troubleshooting-tv-ga...
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
