FirebaseJsNotLoadedException: firebase.js must be loaded.

[alexandrefett]

FirebaseJsNotLoadedException: firebase.js must be loaded.

Future setupApp() async{
config = new FirebaseConfiguration(
apiKey: "",
authDomain: "",
databaseUrl: "",
projectId: "",
storageBucket: "",
);
FirebaseWeb fb = new FirebaseWeb();
await fb.init(config);
app = new MyDatabase(fb);
//app.login();
}