flutter build error while running the project - flutter

Question

I have created on flutter project in window system. it is running with any errors in window. then I have run the same project on ubuntu. I am facing some kind of path not found errors. I have tried all of these things.
run the : 'pub clean' command.
run the : 'flutter doctor' 0 issue found in this command
created a new project and place all the lib folder into the new project in the ubuntu but still
i am facing these errors in console log.
And there is no single error showing in code editor IntelliJ, I also tried it on Android Studio. I am finding the solution for last 2-3 weeks. but no solution found. here is the console part.
console log:
Running Gradle task 'assembleDebug'...
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:1:8: Error: Error when reading '../../Documents/work/flutter/packages/flutter/lib/cupertino.Dart': No such file or directory
import 'package:flutter/cupertino.Dart';
^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:2:8: Error: Error when reading '../../Documents/work/flutter/packages/flutter/lib/services.Dart': No such file or directory
import 'package:flutter/services.Dart';
^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:10:28: Error: Type 'StatelessWidget' not found.
mixin PortraitModeMixin on StatelessWidget {
^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:12:3: Error: Type 'Widget' not found.
Widget build(BuildContext context) {
^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:12:16: Error: Type 'BuildContext' not found.
Widget build(BuildContext context) {
^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:24:43: Error: Type 'StatefulWidget' not found.
mixin PortraitStatefulModeMixin<T extends StatefulWidget> on State<T> {
^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:24:62: Error: Type 'State' not found.
mixin PortraitStatefulModeMixin<T extends StatefulWidget> on State<T> {
^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:24:62: Error: Expected 0 type arguments.
mixin PortraitStatefulModeMixin<T extends StatefulWidget> on State<T> {
^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:26:3: Error: Type 'Widget' not found.
Widget build(BuildContext context) {
^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:26:16: Error: Type 'BuildContext' not found.
Widget build(BuildContext context) {
^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:12:16: Error: 'BuildContext' isn't a type.
Widget build(BuildContext context) {
^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:14:18: Error: Method not found: 'SizedBox'.
return const SizedBox();
^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:26:16: Error: 'BuildContext' isn't a type.
Widget build(BuildContext context) {
^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:28:18: Error: Method not found: 'SizedBox'.
return const SizedBox();
^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:33:11: Error: Superclass has no method named 'dispose'.
super.dispose();
^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:41:5: Error: Getter not found: 'DeviceOrientation'.
DeviceOrientation.portraitUp,
^^^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:42:5: Error: Getter not found: 'DeviceOrientation'.
DeviceOrientation.portraitDown,
^^^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:40:3: Error: Getter not found: 'SystemChrome'.
SystemChrome.setPreferredOrientations([
^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:48:5: Error: Getter not found: 'DeviceOrientation'.
DeviceOrientation.portraitUp,
^^^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:49:5: Error: Getter not found: 'DeviceOrientation'.
DeviceOrientation.portraitDown,
^^^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:50:5: Error: Getter not found: 'DeviceOrientation'.
DeviceOrientation.landscapeLeft,
^^^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:51:5: Error: Getter not found: 'DeviceOrientation'.
DeviceOrientation.landscapeRight,
^^^^^^^^^^^^^^^^^
../../Documents/work/flutter/.pub-cache/hosted/pub.dartlang.org/advance_image_picker-0.0.5+3/lib/widgets/portrait_mode_mixin.dart:47:3: Error: Getter not found: 'SystemChrome'.
SystemChrome.setPreferredOrientations([
^^^^^^^^^^^^
FAILURE: Build failed with an exception.
* Where:
Script '/home/pankaj/Documents/work/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1035
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command '/home/pankaj/Documents/work/flutter/bin/flutter'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 1m 46s
Exception: Gradle task assembleDebug failed with exit code 1

Answer 1

Issue in that is it takes your windows path which you created
I think it may resolve your issue..
Open the project folder path in your terminal and run this command:
flutter clean
Once finish,
Run this command
flutter pub get
If it will not resolve your issue create new project in ubuntu and copy lib folder in your project and replace that lib folder in new project.