title: Can't send Messenger messages to non-tester users even though app is approved
body: <p>My Messenger app got approved earlier today (a few hours ago); the app admin page says: </p>
  
  <blockquote>
    <p>Approved: pages_messaging</p>
  </blockquote>
  
  <p>But now that someone (who was not previously a tester) is trying to use it, I'm getting errors. Specifically, if I try to send a message, the API is returning this:</p>
  
  <blockquote>
    <p>'content': '{"error":{"message":"(#10) Cannot message users who are not admins, developers or testers of the app until pages_messaging permission is reviewed and the app is live.","type":"OAuthException","code":10,"fbtrace_id":"DsZ8V5KCPeP"}}'</p>
  </blockquote>
  
  <p>Do I need to do something to enable non-testers to talk to my bot, or is Facebook's approval status just not propagated yet?</p>