Novu Headless - notifications not showing for custom subscriber IDs

    const fetchNotifications = useCallback(() => {
        const headlessService = headlessServiceRef.current;
        if (!headlessService) return;
        headlessService.fetchNotifications({
            listener: ({ data, error, isError, isFetching, isLoading, status }) => {
             console.log({ data, error, isError, isFetching, isLoading, status });
            },
            onSuccess: (response: IPaginatedResponse<IMessage>) => {
                console.log({
                    notifications: response,
                });
                setNotifications(response.data);
            },
            page: 1, // page number to be fetched
        });
    }, []);


    useEffect(() => {
        const headlessService = new HeadlessService({
            applicationIdentifier: process.env.NEXT_PUBLIC_NOVU_APP_ID!,
            subscriberId: localStorage.getItem("subscriberId")!,
        });
        headlessService.initializeSession({
            listener: (res: FetchResult<ISession>) => {
                headlessServiceRef.current = headlessService;
                console.log(res);
            },
            onSuccess: (session: ISession) => {
                fetchNotifications();
            },
            onError: (error) => {
                console.error(error);
            },
        });
    }, [fetchNotifications]);