title: Upload new APK to Alpha - failed
body: <p>Upload new APK to Alpha</p>
  
  <p><strong>Upload failed</strong></p>
  
  <blockquote>
    <p>You uploaded an APK with an invalid signature (learn more about
    signing). Error from apksigner: ERROR: JAR_SIG_NO_SIGNATURES: No JAR
    signatures</p>
  </blockquote>
  
  <p>Not sure what to do, I'm just trying to make an Alpha release of an Android Studio project..</p>