Não consigo acessar o Inherited Widget da minha InitialPage

Minha tentativa de acessar

home: TaskInherited(
        child: Scaffold(
          backgroundColor: Colors.white,
          appBar: AppBar(
            leading: const Icon(Icons.menu_open),
            backgroundColor: Colors.blue,
            title: const Text(
              'Tarefas',
              textAlign: TextAlign.center,
              style: TextStyle(
                color: Colors.white,
                fontSize: 24,
              ),
            ),
          ),
          //O erro acontece aqui
          body: ListView(
           children: TaskInherited.of(context).listTask,
          ),
          floatingActionButton: FloatingActionButton(
            onPressed: () {
              onButtonClicked(context, "/formPage");
            },
            backgroundColor: Colors.blue,
            child: const Icon(Icons.add),
          ),
        ),
      ),

Meu Inherited Widget

import 'package:flutter/material.dart';
import 'package:my_app_flutter/imports.dart/Task.dart';

class TaskInherited extends InheritedWidget {
  TaskInherited({super.key, required this.child}) : super(child: child);

  final Widget child;

  static TaskInherited? of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<TaskInherited>();
  }

 final List<Tasks> listTask = [
    Tasks(
      nome: 'Aprender flutter',
      foto: 'https://pbs.twimg.com/media/Eu7m692XIAEvxxP?format=png&name=large',
      dificuldade: 0,
    ),
    Tasks(
      nome: 'Aprender flutter',
      foto: 'https://pbs.twimg.com/media/Eu7m692XIAEvxxP?format=png&name=large',
      dificuldade: 1,
    ),
    Tasks(
      nome: 'Aprender flutter',
      foto: 'https://pbs.twimg.com/media/Eu7m692XIAEvxxP?format=png&name=large',
      dificuldade: 10,
    ),
    Tasks(
      nome: 'Aprender flutter',
      foto: 'https://pbs.twimg.com/media/Eu7m692XIAEvxxP?format=png&name=large',
      dificuldade: 3,
    ),
  ];

  void newTask({
    required String name,
    required String url,
    required int difficulty,
  }) {
    listTask.add(
      Tasks(nome: name, foto: url, dificuldade: difficulty),
    );
  }

  @override
  bool updateShouldNotify(TaskInherited oldWidget) {
    return oldWidget.listTask.length != listTask.length;
  }
}

Esse erro acontece : The property 'listTask' can't be unconditionally accessed because the receiver can be 'null'. Try making the access conditional (using '?.') or adding a null check to the target ('!').