¿Por qué recibo este error?

TypeError: constructor ilegal

Debajo está mi archivo store.js:

 import { configureStore, combineReducers } from '@reduxjs/toolkit' import { persistStore, persistReducer } from 'redux-persist' import storage from 'redux-persist/lib/storage' import formReducer from './features/form/form' import modalReducer from './features/modal-status/modal' const persistConfig = { key: 'root', storage, } const rootReducer = combineReducers({ modal: modalReducer, process: formReducer }) const persistedReducer = persistReducer(persistConfig, rootReducer) export default function createStore() { let store = configureStore({ reducer: persistedReducer, devTools: true }) let persistor = persistStore(store) return { store, persistor } }

A continuación se muestra el código de mi reductor de formulario:

 import { createSlice } from '@reduxjs/toolkit' export const formSlice = createSlice({ name: 'process', initialState: { type: 'UNKNOWN', isLogined: false, username: null, clientId: null, avatarUri: null }, reducers: { process(state, action) { if(action.payload.type == 'LOGIN') { if('username' in action.payload && 'clientId' in action.payload && 'avatarUri' in action.payload) { return { ...state, type: 'LOGIN', isLogined: action.payload.isLogined, username: action.payload['username'], clientId: action.payload['clientId'], avatarUri: action.payload['avatarUri'], } } } else { return state } } } }) export const { process } = formSlice.actions export default formSlice.reducer

Y en el componente de reacción utilicé el gancho useSelector como se muestra a continuación:

 const isLogin = useSelector(state => state.process.isLogined)