Cannot build flutter ios after clean up flutter cache - ios

Question

I try to clean up my mobile flutter project: remove Podfile.lock, Podfile, .pub-cache
And then try to run flutter pub get. After than, when run flutter run I get this kind of error below. I still don't know how to fix:
../../../../Software/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_flutter_pdfviewer-20.2.48-beta/lib/src/common/pdfviewer_plugin.dar
t:88:40: Error: The getter 'Uint8List' isn't defined for the class 'PdfViewerPlugin'.
- 'PdfViewerPlugin' is from 'package:syncfusion_flutter_pdfviewer/src/common/pdfviewer_plugin.dart'
('../../../../Software/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_flutter_pdfviewer-20.2.48-beta/lib/src/common/pdfviewer_plugin.
dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'Uint8List'.
_renderedPages![pageIndex] = Uint8List.fromList(image);
^^^^^^^^^
../../../../Software/flutter/.pub-cache/hosted/pub.dartlang.org/fl_chart-0.46.0/lib/src/chart/pie_chart/pie_chart.dart:42:20: Warning:
Operand of null-aware operation '?.' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart'
('../../../../Software/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance?.addPostFrameCallback((_) {
^
../../../../Software/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_pdfviewer_platform_interface-20.2.48-beta/lib/src/method_channel_p
dfviewer.dart:12:7: Error: 'Uint8List' isn't a type.
Uint8List documentBytes, String documentID) async {
^^^^^^^^^
../../../../Software/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_pdfviewer_platform_interface-20.2.48-beta/lib/src/method_channel_p
dfviewer.dart:35:34: Error: 'Uint8List' isn't a type.
return _channel.invokeMethod<Uint8List>('getImage', <String, dynamic>{
^^^^^^^^^
Failed to package /Users/hoang/Works/Projects/unikgate/erest/erest_mobile.
Command PhaseScriptExecution failed with a nonzero exit code
Here is my flutter doctor -v
flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.3.1, on macOS 12.1 21C52 darwin-x64, locale en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] IntelliJ IDEA Community Edition (version 2021.1)
[✓] VS Code (version 1.71.0)
Can some one help me to solve this? Many thanks!