title: AGP Upgrade Assistant window not opening in Android Studio
body: <p>When I press <code>Tools &gt; AGP Upgrade Assistant</code> button, nothing happens.
  <a href="https://i.stack.imgur.com/5bbtO.png" rel="noreferrer"><img src="https://i.stack.imgur.com/5bbtO.png" alt="The button that I press" /></a></p>
  <p>I am using Arctic Fox 2020.3.1 Patch 4. I also tried this on Bumblebee 2021.1.1 and the same problem occurs.</p>
  <p>Other maybe relevant info</p>
  <pre><code>Fluter Android Studio plugin 63.2.1
  Dart Android Studio plugin 203.8452
  Dart 2.15.1
  Flutter 2.8.1
  Android gradle plugin 3.6.0
  Gradle 6.1.1-all
  </code></pre>