Zoho Admin cannot add Google Apps integration?

Zoho Admin cannot add Google Apps integration?

One of the admins on my Zoho account cannot add Google Apps integration, when going to https://www.zoho.com/google-apps/overview.html and clicking on 'Integrate with Google' button they are shown a message that says 'Need Admin Permission!
You do not have privilege to install this application.
Please contact your domain admin or directly sign-up on
application provider website.'

Please advise on what to do