Hi @gamepro110,
Can you provide the logs you see when you get this error ?
Can you try flutter pub cache repair or flutter clean and then flutter run to see if it works for you ?
Thanks.

this is what i get when i tried to run it before flutter pub cache repair
Launching lib\main.dart on Chrome in debug mode... Error: Could not resolve the package 'characters' in 'package:characters/characters.dart'. /D:/SDK%60s/flutter/packages/flutter/lib/src/material/text_field.dart:9:8: Error: Not found: 'package:characters/characters.dart' import 'package:characters/characters.dart'; ^ /D:/SDK%60s/flutter/packages/flutter/lib/widgets.dart:18:1: Error: Not found: 'package:characters/characters.dart' export 'package:characters/characters.dart'; ^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:10:8: Error: Not found: 'package:characters/characters.dart' import 'package:characters/characters.dart'; ^ /D:/SDK%60s/flutter/packages/flutter/lib/src/services/text_formatter.dart:9:8: Error: Not found: 'package:characters/characters.dart' import 'package:characters/characters.dart'; ^ /D:/SDK%60s/flutter/packages/flutter/lib/src/material/text_field.dart:822:61: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. int get _currentLength => _effectiveController.value.text.characters.length; ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/material/text_field.dart:824:118: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. bool get _hasIntrinsicError => widget.maxLength != null && widget.maxLength > 0 && _effectiveController.value.text.characters.length > widget.maxLength; ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:244:64: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. assert(obscuringCharacter != null && obscuringCharacter.characters.length == 1), ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:361:35: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. assert(value != null && value.characters.length == 1); ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:567:11: Error: 'Characters' isn't a type. final Characters remaining = string.characters.skipWhile((String currentString) { ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:567:41: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. final Characters remaining = string.characters.skipWhile((String currentString) { ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:600:47: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. for (final String currentString in string.characters) { ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/rendering/editable.dart:602:40: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. !_isWhitespace(currentString.characters.first.toString().codeUnitAt(0))) { ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/services/text_formatter.dart:355:11: Error: 'CharacterRange' isn't a type. final CharacterRange iterator = CharacterRange(value.text); ^^^^^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/services/text_formatter.dart:355:37: Error: Method not found: 'CharacterRange'. final CharacterRange iterator = CharacterRange(value.text); ^^^^^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/services/text_formatter.dart:356:20: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. if (value.text.characters.length > maxLength) { ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/services/text_formatter.dart:375:61: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. if (maxLength != null && maxLength > 0 && newValue.text.characters.length > maxLength) { ^^^^^^^^^^ /D:/SDK%60s/flutter/packages/flutter/lib/src/services/text_formatter.dart:378:25: Error: The getter 'characters' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'characters'. if (oldValue.text.characters.length == maxLength) {

below is the result after running flutter clean and flutter run
flutter run Running "flutter pub get" in flutter_todo_test... 1.0s Using hardware rendering with device Android SDK built for x86. If you notice graphics artifacts, consider enabling software rendering with "--enable-software-rendering". Launching lib\main.dart on Android SDK built for x86 in debug mode... Running Gradle task 'assembleDebug'... Running Gradle task 'assembleDebug'... Done 27.7s √ Built build\app\outputs\flutter-apk\app-debug.apk. Installing build\app\outputs\flutter-apk\app.apk... 3.3s Waiting for Android SDK built for x86 to report its views... 8ms D/EGL_emulation(11001): eglMakeCurrent: 0xddaf2300: ver 3 0 (tinfo 0xddb91600) I/OpenGLRenderer(11001): Davey! duration=1136ms; Flags=1, IntendedVsync=27874272076054, Vsync=27874272076054, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=27874275486500, AnimationStart=27874275732700, PerformTraversalsStart=27874276379800, DrawStart=27875052265300, SyncQueued=27875054397700, SyncStart=27875055367300, IssueDrawCommandsStart=27875056306900, SwapBuffers=27875268882800, FrameCompleted=27875409907600, DequeueBufferDuration=50434000, QueueBufferDuration=1354000, I/Choreographer(11001): Skipped 67 frames! The application may be doing too much work on its main thread. D/EGL_emulation(11001): eglMakeCurrent: 0xddaf2a80: ver 3 0 (tinfo 0xd5ab2430) Syncing files to device Android SDK built for x86... 623ms

as a side note...
this is all that the app contains seeing i saw it complaining about doing too much
`
import 'package:flutter/material.dart';

void main() {
runApp(TodoAppTest());
}

class TodoAppTest extends StatelessWidget {
@OverRide
Widget build(BuildContext context) {
return MaterialApp(
title: 'todo tutorial',
home: TodoList(),
);
}
}

class TodoList extends StatefulWidget {
@OverRide
_TodoListState createState() => _TodoListState();
}

class _TodoListState extends State {
@OverRide
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Todo Test"),
),
);
}
}
`
please tell me if u need anything else

i tried to debug it in vs code and it works again (forgot to check before sending the reply)
thanks for helping me

Hi @gamepro110,
Can you provide the logs you see when you get this error ?
Can you try flutter pub cache repair or flutter clean and then flutter run to see if it works for you ?
Thanks.

It worked for me.

Use

1. flutter clean
2. flutter run
   This resolved the problem for me...

flutter clean and run again

Thank you!! It worked

thanks it worked for me too!

Related issue: #59645

i am facing the same issue i try this command
----- flutter pub cache repair or flutter clean and then flutter run
it is works for me .

Thanks.

thnx a lot! it works for me.

the reason was because of installing SDK upgrades.
now, it works. thanks.

Hi @gamepro110,
Can you provide the logs you see when you get this error ?
Can you try flutter pub cache repair or flutter clean and then flutter run to see if it works for you ?
Thanks.

This worked for me!!thnx

Delete files

.flutter-plugins
.flutter-plugins-dependencies
.pubspec.lock
.packages

Delete path
.dart_tool

flutter pub cache repair or flutter clean and flutter run

This worked for me.

yes thanks that also worked for me

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