face time activation problem

Hello,

When I'm trying to log in to my FaceTime account, both on my iPhone by using the "Use Apple ID for FaceTime" button and when I try to log in on my Macbook Air using Apple ID. I'm getting a message saying "Er heeft zich een fout voorgedaan tijdens de activering. Probeer het opnieuw." (There has been an error during activation. Try again.)

I have checked my device settings, restarted them and I have looked for an e-mail with an activation link, but I don't seem to have gotten one, nor do I see anywhere I can request (a new) one.

Ellis