The Apple Activation Server is temporarily unavailable.. Apple TV

Hi Johnwood22,

Thanks for posting in Apple Support Communities.

We understand you're unable to connect to Activation Server on Apple TV. Make sure you're connected to a reliable network and you have Apple recommended network settings in place.

Router settings

To ensure that your devices can connect securely and reliably to your network, apply these settings consistently to each Wi-Fi router and access point, and to each band of a dual-band, tri-band, or other multiband router. Before changing the settings, you should take these steps:

* Back up your existing settings, in case you need to restore them.

* Install the latest firmware updates for your router. This is generally done from the app or webpage that you use to administer the router.

* Update the software on your other devices, such as on your Mac and on your iPhone or iPad, to ensure that they have the latest security updates and work best with each other.

After changing the settings, you might need to forget the network on each device that previously joined the network. This ensures that the device uses the router's new settings when rejoining the network.

Security

 Set to WPA3 Personal for better security

      Set to WPA2/WPA3 Transitional for compatibility with older devices

The security setting defines the type of authentication and encryption used by your router, and the level of privacy protection for data transmitted over its network. Whichever setting you choose, always set a strong password for joining the network.

* WPA3 Personal is the newest, most secure protocol currently available for Wi-Fi devices. It works with all devices that support Wi-Fi 6 (802.11ax), and some older devices. 

* WPA2/WPA3 Transitional is a mixed mode that uses WPA3 Personal with devices that support that protocol, while allowing older devices to use WPA2 Personal (AES) instead.

* WPA2 Personal (AES) is appropriate when you can't use one of the more secure modes. In that case, also choose AES as the encryption or cipher type, if available.

Recommended settings for Wi-Fi routers and access points - Apple Support

Regards.