Unable to update Apple watch
I have an iPhone X. All though it’s up to date with its Software Update it no longer updates the Apple Watch, Series 8. I have read that I should be able to update my watch via Wi-Fi but it says ‘Unable to check for update An error occurred while checking for a software update’. I have rebooted the watch, turned off Bluetooth so the iPhone doesn’t connect to watch. Can anyone help please.
Apple Watch, watchOS 4