title: gcloud invalid choice 'preview' error
body: <p>I am trying to build and deploy the "playchat" Android app using Firebase and the App Engine Flexible Environment.</p>
  
  <p><a href="https://cloud.google.com/solutions/mobile/mobile-firebase-app-engine-flexible" rel="nofollow noreferrer">https://cloud.google.com/solutions/mobile/mobile-firebase-app-engine-flexible</a></p>
  
  <p>I am getting a "(gcloud) Invalid choice: 'preview'" error when I try to build and deploy to the cloud with the following command.</p>
  
  <pre><code>mvn clean gcloud:deploy -Dgcloud.gcloud_directory=/usr/local/google-cloud-sdk -X
  </code></pre>
  
  <p>I am using the latest apache-maven (3.3.9) and gcloud (148.0.0).</p>
  
  <p>It looks like there may be an open issue with the gcloud-maven-plugin.</p>
  
  <p><a href="https://github.com/GoogleCloudPlatform/gcloud-maven-plugin/issues/92" rel="nofollow noreferrer">https://github.com/GoogleCloudPlatform/gcloud-maven-plugin/issues/92</a></p>
  
  <p>Can someone please recommend which versions of these tools will play nice together?  This has been an unpleasant first start with gcloud so far.</p>