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Computer Science
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Using Flutter 2.7.10 (latest one) and Android Studio Electric Eel | 2022.1.1 Patch 1. Ran this Flutter program located in this Google Storage drive since it has so many parts to the program 

I got the error message below. Also attached screenshot of the error msg

Please run the program located in that Google Storage drive.

Because it works for some people, but not for others. Some people  get the error msg -

Other people it works fine. We all have the same flutter version and Android Studio. We are all using Windows 10 and 11.

Null check operator used on a null value

When the exception was thrown, this was the stack: 
#0      _TaskListPageState.getUID.<anonymous closure> (package:todolist/pages/tasklist/tasklist.dart:25:17)
#1      State.setState (package:flutter/src/widgets/framework.dart:1133:30)
#2      _TaskListPageState.getUID (package:todolist/pages/tasklist/tasklist.dart:24:5)
#3      _TaskListPageState.initState (package:todolist/pages/tasklist/tasklist.dart:18:5)
#4      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5101:55)
#5      ComponentElement.mount (package:flutter/src/widgets/framework.dart:4944:5)
#6      Element.inflateWidget (package:flutter/src/widgets/framework.dart:3953:16)
#7      Element.updateChild (package:flutter/src/widgets/framework.dart:3676:20)
#8      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4993:16)
#9      StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5133:11)
#10     Element.rebuild (package:flutter/src/widgets/framework.dart:4690:5)
#11     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2743:19)
#12     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:863:21)
#13     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:381:5)
#14     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1289:15)
#15     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1218:9)
#16     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1076:5)
#17     _invoke (dart:ui/hooks.dart:145:13)
#18     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:338:5)
#19     _drawFrame (dart:ui/hooks.dart:112:31)

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Related questions

Using -

Android Studio version Electric Eel Android Studio Electric Eel | 2022.1.1 Patch 1 Flutter ver - 3.7.10 Flutter Program and Screenshot located in this Google Drive -

So far my pc is the only one having this issue - Have uninstalled Android Studio and reinstalled it. Other students were using Java 11. So I downgraded my Java 19 to Java 11 and it still gives me that error message. Running out of ideas. Is there a person here that I can have real time discussion about this problem. 

Program listed and error in this Google drive -

For some reason after I submit the question the link to the google drive disappears so I took a screenshot.

Screenshot of where program is located -

Using -

Android Studio version Electric Eel Android Studio Electric Eel | 2022.1.1 Patch 1 Flutter ver - 3.7.10 Flutter Program and Screenshot located in this Google Drive -   So far my pc is the only one having this issue - Have uninstalled Android Studio and reinstalled it. Other students were using Java 11. So I downgraded my Java 19 to Java 11 and it still gives me that error message. Running out of ideas. Is there a person here that I can have real time discussion about this problem. I noticed other people have similar error messages on Stack overflow for example

Flutter Program ver 3.7.6 and Android Studio Eel ver 2022.1.1 Patch 1

Just fixed the previous issue forgot to turn it on Developer setting for this question -

Now when I run the flutter program - Program listed below

I get the error msg - HiveError: Box not found. Did you forget to call Hive.openBox()? See screenshot below the flutter program How to resolve this hiveError what command to type in for this so-called box?

import 'package:flutter/material.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'pages/home_page.dart';

void main() async {
// init the hive
await Hive.initFlutter();

// open a box
var box = await Hive.openBox('mbox');

runApp(const MyApp());
}

class MyApp extends StatelessWidget {
const MyApp({super.key});

@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: const HomePage(),
theme: ThemeData(primarySwatch: Colors.yellow),
);
}
}

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