I just bought a new Apple TV 4K to replace my original version, and it redownloaded all my apps during set up, including ITVX.

No version of this app supports AirPlay, which isn’t anything new. However when I now try to play something on the Apple TV app I’m getting this weird error. I’ve deleted and reinstalled, but still not working.

It was working just fine on the old box I just unplugged; the only different now is the updated model, and I’m using the HDMI ARC port in the back of my Samsung TV, but can’t think why that would throw up this error. Any ideas?