=== FlutterError 2026-04-22T14:54:49.762026 === Version: 0.9.90+9900 Exception: Null check operator used on a null value Library: foundation library Context: Instance of 'ErrorDescription' Information: Instance of 'ValueNotifier>' Stack: #0 State.setState (package:flutter/src/widgets/framework.dart:1219) #1 _ScrollablePositionedListScrollbarState._updateScrollPosition (package:otzaria/widgets/scrollable_positioned_list_scrollbar.dart:84) #2 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #3 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #4 _ScrollablePositionedListState._updatePositions (package:scrollable_positioned_list/src/scrollable_positioned_list.dart:653) #5 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #6 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #7 _PositionedListState._schedulePositionNotificationUpdate. (package:scrollable_positioned_list/src/positioned_list.dart:365) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1357) #10 SentryWidgetsBindingMixin.handleDrawFrame (package:sentry_flutter/src/binding_wrapper.dart:128) #11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198) #12 _invoke (dart:ui/hooks.dart:356) #13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444) #14 _drawFrame (dart:ui/hooks.dart:328) === FlutterError 2026-04-22T14:54:49.765741 === Version: 0.9.90+9900 Exception: Null check operator used on a null value Library: foundation library Context: Instance of 'ErrorDescription' Information: Instance of 'ValueNotifier>' Stack: #0 State.setState (package:flutter/src/widgets/framework.dart:1219) #1 _ScrollablePositionedListScrollbarState._updateScrollPosition (package:otzaria/widgets/scrollable_positioned_list_scrollbar.dart:84) #2 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #3 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #4 _ScrollablePositionedListState._updatePositions (package:scrollable_positioned_list/src/scrollable_positioned_list.dart:653) #5 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #6 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #7 _PositionedListState._schedulePositionNotificationUpdate. (package:scrollable_positioned_list/src/positioned_list.dart:365) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1357) #10 SentryWidgetsBindingMixin.handleDrawFrame (package:sentry_flutter/src/binding_wrapper.dart:128) #11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198) #12 _invoke (dart:ui/hooks.dart:356) #13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444) #14 _drawFrame (dart:ui/hooks.dart:328) === FlutterError 2026-04-22T14:54:50.253558 === Version: 0.9.90+9900 Exception: Null check operator used on a null value Library: foundation library Context: Instance of 'ErrorDescription' Information: Instance of 'ValueNotifier>' Stack: #0 State.setState (package:flutter/src/widgets/framework.dart:1219) #1 _ScrollablePositionedListScrollbarState._updateScrollPosition (package:otzaria/widgets/scrollable_positioned_list_scrollbar.dart:84) #2 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #3 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #4 _ScrollablePositionedListState._updatePositions (package:scrollable_positioned_list/src/scrollable_positioned_list.dart:653) #5 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #6 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #7 _PositionedListState._schedulePositionNotificationUpdate. (package:scrollable_positioned_list/src/positioned_list.dart:365) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1357) #10 SentryWidgetsBindingMixin.handleDrawFrame (package:sentry_flutter/src/binding_wrapper.dart:128) #11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198) #12 _invoke (dart:ui/hooks.dart:356) #13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444) #14 _drawFrame (dart:ui/hooks.dart:328) === FlutterError 2026-04-22T14:54:50.256555 === Version: 0.9.90+9900 Exception: Null check operator used on a null value Library: foundation library Context: Instance of 'ErrorDescription' Information: Instance of 'ValueNotifier>' Stack: #0 State.setState (package:flutter/src/widgets/framework.dart:1219) #1 _ScrollablePositionedListScrollbarState._updateScrollPosition (package:otzaria/widgets/scrollable_positioned_list_scrollbar.dart:84) #2 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #3 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #4 _ScrollablePositionedListState._updatePositions (package:scrollable_positioned_list/src/scrollable_positioned_list.dart:653) #5 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #6 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #7 _PositionedListState._schedulePositionNotificationUpdate. (package:scrollable_positioned_list/src/positioned_list.dart:365) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1357) #10 SentryWidgetsBindingMixin.handleDrawFrame (package:sentry_flutter/src/binding_wrapper.dart:128) #11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198) #12 _invoke (dart:ui/hooks.dart:356) #13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444) #14 _drawFrame (dart:ui/hooks.dart:328) === FlutterError 2026-04-22T14:54:50.416168 === Version: 0.9.90+9900 Exception: Null check operator used on a null value Library: foundation library Context: Instance of 'ErrorDescription' Information: Instance of 'ValueNotifier>' Stack: #0 State.setState (package:flutter/src/widgets/framework.dart:1219) #1 _ScrollablePositionedListScrollbarState._updateScrollPosition (package:otzaria/widgets/scrollable_positioned_list_scrollbar.dart:84) #2 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #3 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #4 _ScrollablePositionedListState._updatePositions (package:scrollable_positioned_list/src/scrollable_positioned_list.dart:653) #5 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #6 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #7 _PositionedListState._schedulePositionNotificationUpdate. (package:scrollable_positioned_list/src/positioned_list.dart:365) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1357) #10 SentryWidgetsBindingMixin.handleDrawFrame (package:sentry_flutter/src/binding_wrapper.dart:128) #11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198) #12 _invoke (dart:ui/hooks.dart:356) #13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444) #14 _drawFrame (dart:ui/hooks.dart:328) === FlutterError 2026-04-22T14:54:50.418166 === Version: 0.9.90+9900 Exception: Null check operator used on a null value Library: foundation library Context: Instance of 'ErrorDescription' Information: Instance of 'ValueNotifier>' Stack: #0 State.setState (package:flutter/src/widgets/framework.dart:1219) #1 _ScrollablePositionedListScrollbarState._updateScrollPosition (package:otzaria/widgets/scrollable_positioned_list_scrollbar.dart:84) #2 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #3 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #4 _ScrollablePositionedListState._updatePositions (package:scrollable_positioned_list/src/scrollable_positioned_list.dart:653) #5 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:432) #6 ValueNotifier.value= (package:flutter/src/foundation/change_notifier.dart:560) #7 _PositionedListState._schedulePositionNotificationUpdate. (package:scrollable_positioned_list/src/positioned_list.dart:365) #8 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1430) #9 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1357) #10 SentryWidgetsBindingMixin.handleDrawFrame (package:sentry_flutter/src/binding_wrapper.dart:128) #11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1198) #12 _invoke (dart:ui/hooks.dart:356) #13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:444) #14 _drawFrame (dart:ui/hooks.dart:328)