Message reads:
iCloud is not currently available. Try again later.
BRAVIA4KUR3,
Do you have an Apple TV box for which this happens? Which model? Identify your Apple TV model - Apple Support
Also check Apple’s system status for services with known outages, if any.
Apple TV (3rd generation)
Several users have recently reported similar iCloud sign-in issues with the 3rd generation model on this forum. I haven’t read here about an exact cause, nor a solution.
Please consider contacting Apple directly for an explanation or solution. Contact Apple for support and service (phone numbers) or start your support request online (chat/email/callback).
Apple TV box - Model #1469 (3rd generation)
Cannot sign into iCloud on apple tv
