Why fetch response becomes undefined?

Question

typescript

Hello.
The problem is that when I make a fetch request using the useEffect hook, I kind of get valid information in the first promise, and in the next promise, when I want to save this info to a variable, it is already undefined.
Here is the code:

const ChatList: React.FC = () => {
    const [error, setError] = useState(null);
    const [isLoaded, setLoaded] = useState(false);
    const [response, setState] = useState<ServiceResponseGeneric<UserDto>>();

    useEffect(() => {
        fetch(URL)
            .then(result => result.json() as Promise<ServiceResponseGeneric<UserDto>>)
            .then(
                (result) => {
                    setLoaded(true)
                    setState(result)
                    console.log(result) // здесь ничего уже не отображает, а если бы я поставил лог в начало, перед setLoaded, то все вывело бы. Как будто после setLoaded все куда то не туда идет
                },
                (error) => {
                    setLoaded(true)
                    setError(error)
                }
            )
    }, [])

    if (error) {
        return <div>Ошибка</div>
    } else if (!isLoaded) {
        return <div>Загрузка</div>
    } else {
        return <div className="chatList">
            <div className="messagesTitle">Последние сообщения</div>
            {
                Array.from(response?.Value!).map(item =>
                    <ChatListItem
                        chatId={item.Id}
                        chatName={item.Login}
                        messagePreview="Заглушка"
                        sentTime="21:14"/>)
            }
        </div>;
    }
}

Just in case, here are the used
ServiceResponseGeneric classes

export class ServiceResponseGeneric<T> extends ServiceResponse{
    Value: Array<T>
//он не наследует ничего такого важного, типа errorMessage: string и всякое такое
    
    constructor(val: Array<T>) {
        super();
        this.Value = val
    }
}

UserDto

export class UserDto {
    Id: string = ""
    Login: string = ""
}

There are many answers to this question on the internet and they seem to be good, but it doesn't work for me. The server returns everything is normal.
Thank you.