I have a friend who has bought and installed Minecraft Windows 10 edition but cannot sign into his Xbox account. Whenever he hits the "sign in for free" button it redirects him to this site: https://beta.support.xbox.com/help/family-online-safety/online-safety/manage-app-privacy-settings-xbox-one

He has tried to do said tasks but failed and this error has only happened to him because me and other friends are just fine. Please send a solution/resolve this issue