SwipeRefreshLayout doesn't show my RecyclerView as soon as I add it to the XML

I have a problem with a SwipeRefreshLayout, I want to implement it to be able to perform the Pull to refresh function in a view that contains a RecyclerView, the problem is that when I add the SwipeRefreshLayout and run my app, the RecyclerView no longer shows me anything, it shows me completely blank, this is my XML file:

<?xml version="1.0" encoding="utf-8"?>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_height="match_parent"
    android:layout_width="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/list"
        android:name="com.seccion.yugioh.ui.inicio.InicioCartasItemFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        app:layoutManager="LinearLayoutManager"
        tools:context=".ui.inicio.InicioCartasItemFragment"
        tools:listitem="@layout/fragment_inicio_cartas_item" />

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

I don't understand what the problem is, I'm just adding the SwipeRefresh to be able to reload my RecyclerView when the user pulls the view but once it's added I don't see anything in the RecyclerView anymore.

The list is supposed to display a list of cards:

And when I run my application with SwipeRefresh, nothing is shown:

And this is my class where I load that RecyclerView:

public class InicioCartasItemFragment extends Fragment {

    private int mColumnCount = 1;
    //Declaramos como variable global el recyclerView
    private RecyclerView recyclerView;
    //Declaramos como variable global nuestro adaptador
    private MyInicioCartasItemRecyclerViewAdapter adapter;
    //Creamos una lista gobal de nuestra respuesta del servidor que contiene el modelo de nuestro json
    private List<ResponseCartas> cartasList;
    //Creamos una instancia a nuestra clase ViewModel que nos permitira recuperar la informacion y enviarla al adapter
    private CartasViewModel cartasViewModel;

    public InicioCartasItemFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //Inicializamos nuestra clase ViewModel
        cartasViewModel = ViewModelProviders.of(getActivity()).get(CartasViewModel.class);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_inicio_cartas_item_list, container, false);
        // Set the adapter
        if (view instanceof RecyclerView) {
            Context context = view.getContext();
            recyclerView = (RecyclerView) view;

            if (mColumnCount <= 1) {
                recyclerView.setLayoutManager(new LinearLayoutManager(context));
            } else {
                recyclerView.setLayoutManager(new GridLayoutManager(context, mColumnCount));
            }
            adapter = new MyInicioCartasItemRecyclerViewAdapter(cartasList, getActivity());
            recyclerView.setAdapter(adapter);
            loadCartas();
        }

        return view;
    }

    //En este metodo debemos mandar a llamar al metodo de getListaCartas que se encuentra en nuestra clase ViewModel
    //a este metodo le pasaremos un observador que nos permitira pasar los datos una vez cargados a nuestro adaptador
    private void loadCartas() {
        cartasViewModel.getListaCartas().observe(getActivity(), new Observer<List<ResponseCartas>>() {
            @Override
            public void onChanged(List<ResponseCartas> responseCartas) {
                //a la lista que creamos en esta clase debemos igualarla a la lista que noes devuelve como respuesta nuestro servidor
                cartasList = responseCartas;
                //Una vez que rescuperamos la lista de cartas de servidor la enviamos a un metodo dentro de nuestra clase adapter
                adapter.setData(cartasList);
            }
        });
    }

}