Instance of 'NotInitializedError' in Flutter integration

[rohxnn]

import 'package:flutter/material.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:profitolio_mobile/config/app_theme.dart';
import 'package:profitolio_mobile/screens/login/login_screen.dart';

void main() async {
WidgetsFlutterBinding.ensureInitialized();

await dotenv.load(
fileName: '.env');

runApp(MyApp());
}

class MyApp extends StatelessWidget {
@OverRide
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter Login',
theme: AppTheme.lightTheme,
home: LoginScreen(),
);
}
}

I am getting this error. It would be helpful if someone could come up with a solution. :)
╞═══════════════════════════════════════════════════════════
js_primitives.dart:28 The following NotInitializedError was thrown building Builder:
js_primitives.dart:28 Instance of 'NotInitializedError'