title: Layout preview appearing blank despite of adding items (text boxes etc). Even project name is not appearing on screen
body: <ul>
  <li>I created a new project on android studio  </li>
  <li>open layout >>  activity_main  </li>
  <li>drag and drop text box on layout but still it is empty.</li>
  </ul>
  
  <p>Tried to make font black and edit other settings but nothing helps.</p>
  
  <p>Image </p>
  
  <p><a href="https://i.stack.imgur.com/AK2Gb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AK2Gb.png" alt="enter image description here"></a></p>