Cannot connect to world

I have things setup. I can connect to the world from my tablet. However, my son cannot connect from his ipad. The versions all align. I have been trying different things and I am not sure what I am missing.

Ok, so I have done some more testing. My tablet, which works, cannot connect when logged in with my kids MS account. It is something to do with his account.

https://support.xbox.com/en-US…privacy-settings-xbox-one

I have changed the 3 settings for my kid's xbox account and still, no luck. It is driving me nuts.

Quote from AlexanderSniper1

Can you show a screenshot of the error message?

attached.