GB News App not working on Apple TV

When I try to open the App on Apple TV it tries to open but then immediately reverts to the main App Page.

I have rebooted by Apple TV, restarted my Apple TV, removed the GB News App and reinstalled it on my Apple TV but I always get the same result, reverse to main Apps Page.

For info, all other Apps on my Apple TV are working fine (Sky News, Now, 4, 5 etc)