Email invite issues

I'm having an issue inviting other players via email.
When I hit the email icon the following appears"
"Email not available. You need to register your email account on this device before sending an invitation through email."
But I am signed in using my email and I don't see a setting that applies.
any help would be appreciated.
When I hit the email icon the following appears"
"Email not available. You need to register your email account on this device before sending an invitation through email."
But I am signed in using my email and I don't see a setting that applies.
any help would be appreciated.