File google services json is missing the google services Plugin cannot function without it Flutter

} The google-services plugin has two main functions: Process the google-services. json file and produce Android resources that can be used in your application’s code . See Adding the JSON File more information.

Android – How to get the Google Services Json

What it does. So this plugin and JSON file are not essential to running or publishing your app, it is just a quickstart helper to generate some basic android-resource files for easier integration of specific Google API features .