@Kjmarriott I'm really sorry about the problem with your BT TV. Can you follow these steps and post back to let me know if they help?
Try to access the BT Player. Press the Home (or YouView) button, then scroll to and select BT Player. If you still see the error message then try restarting your equipment by following these steps:
I'm sorry those steps haven't worked. If you send me in your details I'll be able to help you with this. You can send me in your details using the "Contact The Mods" link found in profile.