title: Android studio new project design preview is empty
body: <p>I've started learning android development and I created multiple new projects with basic activity but none of them with a preview. I tried to build->clean and file->invalidate caches / restart but that didn't work</p>
  
  <pre><code>Android Studio 3.1.4
  Build #AI-173.4907809, built on July 23, 2018
  JRE: 1.8.0_152-release-1024-b02 amd64
  JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
  Windows 10 10.0
  </code></pre>
  
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