If you're able to play live streams but are seeing an error message when you try to listen to on demand content on the BBC Sounds app, it's likely because you have a VPN enabled on your device.
To regain access to all of the content on BBC Sounds, switch off your VPN.
For more information on why you may be detected as being overseas and therefore unable to play all content on BBC Sounds, have a look here: Why do you think I'm outside the UK?
If you're having any other issues with BBC Sounds on your phone or tablet, the following page should help: Help fixing problems with BBC Sounds on your mobile or tablet