title: iTunes Connect - Can't invite "internal testers" for prerelease app
body: <p>I got my app approved for distribution through the new Apple TestFlight app. I tried to invite an &quot;internal tester&quot; through <code>iTunes Connect -&gt;Prerelease -&gt;Internal Testers</code> but all I see are 2 info boxes:</p>
  <blockquote>
  <ol>
  <li><p><em>To start testing, select at least one Internal Tester.</em></p>
  </li>
  <li><p><em>Internal testers can be added in Users and Roles. Internal testers are iTunes Connect users with the Admin or Technical role.</em></p>
  </li>
  </ol>
  </blockquote>
  <p>I already added an Admin an Technical user to <code>Users and Roles</code> but I can't invite them.
  How to invite an internal tester?</p>