Android Studio 3.5 Cause: buildOutput.apkData must not be null Clean & Rebuild already tried

Question

After I\'ve updated Android Studio 3.4 to 3.5 and wanted to build a Signed APK, however I get the error :

Cause: buildOutput.apkData must not be null Erro

Answer 1

Delete the contents of the build folders (existing *.apk and output.json):-

1. AndroidProject\app\build\outputs\apk\androidTest\debug\
2. AndroidProject\app\build\outputs\apk\debug\
3. AndroidProject\app\release\

And then rebuild the system by:-

File -> Sync Project with Gradle Files