title: react-facebook-login works on desktop browser but throws "URL Blocked: This redirect failed because the redirect URI is not whitelisted" on mobile
body: <p>My web app, <a href="https://stockbets.io" rel="nofollow noreferrer">stockbets.io</a>, uses Facebook login for oauth. On a desktop web browser this works fine, and none of my pilot users have had any trouble signing in. When they try the exact same flow on mobile, however, we get this error:</p>
  <pre><code>URL Blocked: This redirect failed because the redirect URI is not whitelisted in the app’s Client OAuth Settings. Make sure Client and Web OAuth Login are on and add all your app domains as Valid OAuth Redirect URIs.
  </code></pre>
  <p>Here is a snapshot of my settings panel for the Facebook Login service:</p>
  <p><a href="https://i.stack.imgur.com/jsfGN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jsfGN.png" alt="enter image description here" /></a></p>
  <p>This seems like it should be straightforward, but I'm at a loss as to why this works on desktop but not mobile. The expected behavior, if you'd like to test, is that you should receive a message saying that the product is in early beta but send us an email if you'd like early access. What happens currently is the above error message.</p>
  <p>Any tips?</p>