title: Flutter in Android Studio: Build Bundle/APK greyed out
body: <p>I installed Flutter and Android Studio following this link here:
  <a href="https://flutter.dev/docs/get-started/editor" rel="noreferrer">https://flutter.dev/docs/get-started/editor</a></p>
  
  <p>I've been coding in flutter for two months now and can run my app in simulator or on a connected device no problem.</p>
  
  <p>But when I try to actually build an apk via "Build" --> "Build Bundle(s) / APK", this option is greyed out. </p>
  
  <p>Android Studio: 3.3.2</p>