Impossible de lancer un projet

Salut, le projet ce lance correctement chez mon collaborateur ce qui n’est pas le cas chez moi chez moi, nous avons la même version de Flutter (la dernière). Voici ce qui me donne mon « debug console »

super.debugFillProperties(properties);
      ^^^^^^^^^^^^^^^^^^^
/C:/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_flutter_core-18.2.44/lib/src/theme/slider_theme.dart:477:11: Error: Superclass has no method named 'debugFillProperties'.
super.debugFillProperties(properties);
      ^^^^^^^^^^^^^^^^^^^
/C:/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_flutter_core-18.2.44/lib/src/theme/theme_widget.dart:286:11: Error: Superclass has no method named 'debugFillProperties'.
super.debugFillProperties(properties);
      ^^^^^^^^^^^^^^^^^^^
/C:/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:167:11: Error: Superclass has no method named 'debugFillProperties'.
super.debugFillProperties(properties);
      ^^^^^^^^^^^^^^^^^^^
/C:/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:171:30: Error: The method 'toStringShort' isn't defined for the class 'PictureStreamCompleter'.
 - 'PictureStreamCompleter' is from 'package:flutter_svg/src/picture_stream.dart' ('/C:/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart').
Try correcting the name to the name of an existing method, or defining a method named 'toStringShort'.
  ifPresent: _completer?.toStringShort(),
                         ^^^^^^^^^^^^^
/C:/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_svg-0.17.4/lib/src/picture_stream.dart:266:11: Error: Superclass has no method named 'debugFillProperties'.
super.debugFillProperties(description);
      ^^^^^^^^^^^^^^^^^^^


FAILURE: Build failed with an exception.

* Where:
Script 'C:\Flutter\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 896

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\Flutter\flutter\bin\flutter.bat'' 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 24s
Exception: Gradle task assembleDebug failed with exit code 1
Exited (sigterm)

Avec flutter clean qu’est-ce que cela donne ?

voici ce que ça donne

Tu es sûr d’être à la racine du projet ? Sinon supprime le dossier build, et essaye la commande flutter create .