Error When Using image_gallery_saver ^2.0.3 to Save Poster Image in Flutter 3.24.3: Package Not Found and Undefined Getter

[wjb2135]

flutter: 3.24.3
image_gallery_saver: 2.0.3

"I am using image_gallery_saver version ^2.0.3 to implement a poster image saving feature in Flutter 3.24.3. When I click to save the image, I get the following error:
Error: Couldn't resolve the package 'image_gallery_saver' in 'package:image_gallery_saver/image_gallery_saver.dart'.
lib/presentation/invite/tab_invite/poster_widget/view.dart:7:8: Error: Not found: 'package:image_gallery_saver/image_gallery_saver.dart'
import 'package:image_gallery_saver/image_gallery_saver.dart';
^
lib/presentation/invite/tab_invite/poster_widget/view.dart:102:13: Error: The getter 'ImageGallerySaver' isn't defined for the class 'PosterWidgetPage'.

• 'PosterWidgetPage' is from 'package:wepaytob_app/presentation/invite/tab_invite/poster_widget/view.dart' ('lib/presentation/invite/tab_invite/poster_widget/view.dart').
  Try correcting the name to the name of an existing getter, or defining a getter or field named 'ImageGallerySaver'.
  await ImageGallerySaver.saveImage(
  ^^^^^^^^^^^^^^^^^

[knottx]

See this #295