Recibo un error, no durante la compilación, pero en mi navegador, adjunté los archivos aquí

archivo reductor de mensaje.js

 import store from './index'; // ACTION TYPES const FETCH_MESSAGES = "FETCH_MESSAGES"; // ACTIONS export const fetchMessages = ( id ) => { console.log(store.getState()); return { type: FETCH_MESSAGES, payload: id } } // REDUCERS export default function reducer( state = -1, action ) { switch(action.type) { case FETCH_MESSAGES : return action.payload; default: return state; } }

índice.js

 import { createStore, combineReducers, applyMiddleware } from 'redux'; import thunk from 'redux-thunk'; import chatReducer from './chat'; import messageReducer from './messages'; const reducer = combineReducers({ chatStore : chatReducer, messageStore : messageReducer, }); const store = createStore(reducer, applyMiddleware(thunk)); export default store;

Mensaje de error Captura de pantalla del mensaje de error