A PersistentTabController was used after being disposed.

Once you have called dispose() on a PersistentTabController, it can no longer be used.

esse problema ocorreu pq eu tenho uma classe que verifica se o aparelho esta ou nao conectado a internet. Quando eu desconecto e conecto o aparelho novamente a internet ele retorna esse erro.

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MainController mainController = Get.put(MainController());
  late final StreamSubscription<InternetConnectionStatus> listener;
  bool connected = true;
  Map<String, dynamic>? userData;

  @override
  void initState() {
    super.initState();
    listener = internetConnectionChecker.onStatusChange.listen((status) {
      final notifier = ConnectionNotifier.of(context);
      notifier.value = status == InternetConnectionStatus.connected;
      setState(() {
        connected = status == InternetConnectionStatus.connected;
      });
    });
    mainController.loadUserData().then((data) {
      setState(() {
        userData = data;
      });
    });
  }

  @override
  void dispose() {
    listener.cancel();
    super.dispose();
  }