You're
probably already logged in to that social media account (note: Gmail is
part of the Google platform). You have three options:
If you don't need to be logged in to the social media account right now, log out of the social media account and try again.
If you're still on the first activation step (i.e., you haven't
logged in using a social media account yet) and your email address is
associated with more than one of the three social media accounts, use
another account instead.
If you need to use this account and you need keep your social media account open:
Open a different browser (e.g., Internet Explorer, Safari, Google Chrome, Mozilla Firefox).
Confirm that you're not logged in to your social media account in that browser.
Copy the link from your email message into the browser's address bar, and hit Enter.
Select your social media account, and continue the process.