'_cacheManager == null': is not true audio service issue fix

Question

If anybody getting an issue in the audio_service library in flutter then this minor code may be helpful in fixing it

WillPopScope(
onWillPop: () async {
        await _audioHandler.stop();
        return true;
      },
child: Scaffold(...))

Answer 1

I got this error because I initialized just_audio_background and audio_service package at the same time.