title: Error deploying my Symfony code to App Engine, status: 1
body: <p>I'm currently trying to deploy the Symfony sample <a href="https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/appengine/flexible/symfony" rel="nofollow noreferrer">code</a> to App Engine Flexible Environment. But I am getting this error.</p>
  <p><a href="https://i.stack.imgur.com/ro0zV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ro0zV.png" alt="app.yaml" /></a></p>
  <p><a href="https://i.stack.imgur.com/93tSw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/93tSw.png" alt="ERROR" /></a></p>