Setup Apple Watch with family support stuck on terms

Greetings Melfyr,

Welcome to Apple Support Communities. First, you need to make sure that the iPhone you are using has the most current iOS version. The steps to check and update if needed are found in the Apple Support article: Update your iPhone or iPad

Update your iPhone or iPad wirelessly

1.Back up your device using iCloud or your computer.

2.Plug your device into power and connect to the internet with Wi-Fi.

3.Go to Settings > General, then tap Software Update.

4.If you see more than one software update option available, choose the one that you want to install.

5.Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.

You also want to make sure that the iPhone is connected to a compatible Wi-Fi network, 2.4GHz, not captive, and not an Enterprise or Education network. And check that the date and time are set correctly of the iPhone. Go to Settings > General > Date & Time, and make sure the time zone is correct as well as it is set to "Set Automatically".

Let us know the outcome, and we can go from there if needed.

We look forward to hearing back from you.