package produces build error

[AballahEhab]

../../../flutter/usedVersion/.pub-cache/hosted/pub.dartlang.org/keyboard_actions-4.2.0/lib/keyboard_actions.dart:322:31: Error: A value of type 'OverlayState?' can't be assigned to a variable of type 'OverlayState' because 'OverlayState?' is nullable and 'OverlayState' isn't.

• 'OverlayState' is from 'package:flutter/src/widgets/overlay.dart' ('../../../flutter/usedVersion/packages/flutter/lib/src/widgets/overlay.dart').
  OverlayState os = Overlay.of(context);
  ^
  ../../../flutter/usedVersion/.pub-cache/hosted/pub.dartlang.org/keyboard_actions-4.2.0/lib/external/keyboard_avoider/bottom_area_avoider.dart:194:27: Error: Method 'getOffsetToReveal' cannot be called on 'RenderAbstractViewport?' because it is potentially null.
• 'RenderAbstractViewport' is from 'package:flutter/src/rendering/viewport.dart' ('../../../flutter/usedVersion/packages/flutter/lib/src/rendering/viewport.dart').
  Try calling using ?. instead.
  final offset = viewport.getOffsetToReveal(object, 1.0).offset + overscroll;

[MarcoChong]

you have to upgrade the flutter to last version

[Galeen-Bidpath]

If you are on flutter < 3.7.3 and don't need to use latest version, use v4.1.0.

[ricardonior29]

Im using flutter 3.3.3 - Dart version 2.18.2 and I keep getting the error. I already tried the pub versions 4.2.0, 4.1.0, 4.0.1 and 4.0.0

`: Error: A value of type 'OverlayState?' can't be assigned to a variable of type 'OverlayState' because 'OverlayState?' is nullable and 'OverlayState' isn't.
keyboard_actions.dart:322

• 'OverlayState' is from 'package:flutter/src/widgets/overlay.dart' ('../development/flutter/packages/flutter/lib/src/widgets/overlay.dart').
  overlay.dart:1
  OverlayState os = Overlay.of(context);`

`: Error: Method 'getOffsetToReveal' cannot be called on 'RenderAbstractViewport?' because it is potentially null.

• 'RenderAbstractViewport' is from 'package:flutter/src/rendering/viewport.dart' ('../development/flutter/packages/flutter/lib/src/rendering/viewport.dart').
  Try calling using ?. instead.
  final offset = viewport.getOffsetToReveal(object, 1.0).offset + overscroll;
  ^^^^^^^^^^^^^^^^^`

[Felypee]

I downgraded the package version to keyboard_actions: ^3.4.7. So try downgrade it until it works.