Issue with Apple TV photosharing

I have added some additional photos to a folder which I have been photosharing with Apple TV and I want them to be included in the Screensaver images shown on my Apple TV.

Am using the same account, but get the message -'iCloud Terms of Service have changed - Unable to login - go to www.apple.com/support/icloud.

I can't find any answers there and the Apple TV is still using the original photos in the screensaver.

Thanks for any suggestions.