i have this error when run my app :

WARNING Compiled with 1 warnings 11:50:40 PM warning in ./src/store/store.js "export 'createStore' was not found in 'vuex'

I installed vuex by npm install --save vuex

I'm using vue 3

my Store.js:

import { createStore } from 'vuex';
import Movie from './Modules/Movie';
import post from './Modules/post';

const store = createStore({
  modules: {
    post,
    Movie,
  },
});

export default store;

my main.js:

import { createApp } from 'vue';
import App from './App.vue';
import router from './router';
import store from './store/store.js';

const app = createApp(App);
app.use(store);
app.use(router);
app.mount('#app');