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Launching lib\main.dart on Chrome in debug mode...
Warning: In index.html:37: Local variable for "serviceWorkerVersion" is deprecated. Use "{{flutter_service_worker_version}}" template token instead. See https://docs.flutter.dev/platform-integration/web/initialization for more details.
../../flutter/packages/flutter/lib/src/widgets/form.dart:255:16: Error: The getter '_widget' isn't defined for the class 'Form'.
- 'Form' is from 'package:flutter/src/widgets/form.dart' ('../../flutter/packages/flutter/lib/src/widgets/form.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named '_widget'.
   if (widget._widget! == AutovalidateMode.onUnfocus) {
              ^^^^^^^
Failed to compile application.

Exited (1).