title: Oracle Apex Facebook Login : Your session has expired?
body: <p>I'm running Apex 19.2 on Oracle 18c XE database.</p>
  <p>I have an application and I'm trying to add Facebook Login feature.</p>
  <ul>
  <li>I created the web credentials</li>
  <li>I created a new Authentication Scheme using the web credentials</li>
  <li>I added a button to a page with Apex authentication flag pointing on the new authentication Scheme (<strong>APEX_AUTHENTICATION=Facebook</strong>) and redirecting to a private page</li>
  <li>When I run the page and click the button, I'm redirected correctly to facebook, I authorize the app to access my information</li>
  <li>But when facebook redirects me to my page, I got the message, your session has expired.</li>
  <li>Also the code I added for debugging purposes in Post Authenticate procedure is not executing.</li>
  </ul>
  <p>Can anyone help please ?</p>
  <p>Thanks,
  Cheers,</p>
  <h1>Web Credentials :</h1>
  <p><a href="https://i.stack.imgur.com/EJDYs.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EJDYs.jpg" alt="enter image description here" /></a></p>
  <h1>Authentication Scheme :</h1>
  <p><a href="https://i.stack.imgur.com/ZkG1q.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZkG1q.jpg" alt="enter image description here" /></a></p>
  <h1>Button :</h1>
  <p><a href="https://i.stack.imgur.com/XOIFR.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XOIFR.jpg" alt="enter image description here" /></a></p>