while Image picker, I couldn't solve this error.
CodePudding user response：
Apparently you have imported some unrelated File types from other libraries. To fix this, remove the imports:
C:\Users\91908\Downloads\ flutter_windows 3.3.9-stable\flutter\bin\cache lpkg \sky_engine\lib\html html_dart2js.dart
C: Users\91908\Downloads\flutter windows_3.3.9-stable\flutter\bin|cache\pkg\sky_engine Vib\io\file.dart
Now click on the imageFile variable and import the appropriate class.
CodePudding user response：
This issue is because You are importing two libraries having property named as File. Just import "Dart io" which is responsible for image Files.
import 'dart:io';
It is defined at (C: Users\91908\Downloads\flutter windows_3.3.9-stable\flutter\bin|cache\pkg\sky_engine Vib\io\file.dart) in your PC.
And remove the other library which is causing issue. In your case probably it is
html_dart2js;
It is defined at (C:\Users\91908\Downloads\ flutter_windows 3.3.9-stable\flutter\bin\cache lpkg \sky_engine\lib\html html_dart2js.dart) in your PC.