Null check operator on a null value

[DanielMartini]

Hello!

Someone else is getting this error on crashlytics?

[✓] Flutter (Channel beta, 3.30.0-0.1.pre, on macOS 14.7.4 23H420 darwin-x64,
    locale es-ES)
[✓] Flutter (Channel beta, 3.30.0-0.1.pre, on macOS 14.7.4 23H420 darwin-x64,
    locale es-ES)

Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Null check operator used on a null value at AnimationController.stop(animation_controller.dart:924) at AnimationController._animateToInternal(animation_controller.dart:690) at AnimationController.reverse(animation_controller.dart:538) at _RoundScrollbarState._maybeHideAfterDelay.<fn>(round_scrollbar.dart:172)