Why can't I download apps from Play Store?

When am trying to download its shows this message.... My family need to be set up before you can get this app Aak a parent to go to Windowsphone.com/ family on their computer ,and sign in Microsoft account ,and set up my family... Can any one plzzzz give me the solution....and recently am installed software

    Hi sinan. Can you tell us which phone you are using? Hope to read from you soon.

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