TypeError: Cannot read property 'dispatch' of undefined嘗試提交 Login.vue 表單時出現錯誤。我將我的更改function()為只是data()等，就像建議的 SO 答案一樣，但這并沒有幫助......index.js：import Vue from 'vue';import Vuex from 'vuex';import auth from './store/auth.module.js';Vue.use(Vuex);export default new Vuex.Store({    //plugins: [createPersistedState({ storage: sessionStorage })],    state: {  },    mutations: {  },    actions: {  },    modules: { auth }})主.js：import Vue from 'vue'import App from './App.vue'import router from './router';import store from './store/auth.module';import "./assets/css/tailwind.css";import '@/assets/css/tailwind.css';Vue.config.productionTip = false;new Vue({  router,   store,  render: h => h(App),}).$mount('#app');auth-header.js：export default function authHeader() {    let user = JSON.parse(localStorage.getItem('user'));    if (user && user.accessToken) {        return { Authorization: 'Bearer ' + user.accessToken };    } else {        return {};    }}user.service.js：import axios from 'axios';import authHeader from './auth-header';const API_URL = 'localhost:8088/testproject/api/users';class UserService {    getPublicContent() {        return axios.get(API_URL + '/all');    }    getUserBoard() {        return axios.get(API_URL + '?role=user', { headers: authHeader() });    }    getModeratorBoard() {        return axios.get(API_URL + '?role=mod', { headers: authHeader() });    }    getAdminBoard() {        return axios.get(API_URL + '?role=admin', { headers: authHeader() });    }}export default new UserService();