title: ERROR: (gcloud.app.deploy) could not be identified as a valid source directory or file
body: <p>I get this error every time I run the <code>gcloud app deploy</code> command.</p>
  
  <p>My <code>app.yaml</code> is in the same directory as where <code>manage.py</code> is.
  I am also not working from Local disk C, am working from Local disk G and using Visual studio code cmd terminal.</p>
  
  <pre><code>ERROR: An app.yaml (or appengine-web.xml) file is required to deploy this directory as an App Engine application. Create an app.yaml file using the directions at https://cloud.google.com/appengine/docs/flexible/python/configuring-your-app-with-app-yaml (App Engine Flexible Environment) or https://cloud.google.com/appengine/docs/standard/python/config/appref (App Engine Standard Environment) under the tab for your language.
  
  ERROR: (gcloud.app.deploy) [G:\] could not be identified as a valid source directory or file.
  </code></pre>