I’m trying to run my flutter app on chrome for web. But every time I run my flutter code. Its encountering the following error.

I took over a Flutter app from another developer. But they don’t want to hand over their keystore and sign keys for the Google Play Store which I’m guessing is why the app is throwing the below error when testing with a physical device build(locally):

I am setting up my Flutter project with Firebase. I have setup it using flutterfire configure and I can see the firebase.json was created inside my app’s root directory.