vue脚手架4.5 引入element-plus按照官方配置报错怎么解决

#项目是Vue3.0 用的vue-cli4.5
#以下是main.js

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

import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'

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

#控制台报如下错误

 ERROR  Failed to compile with 1 error                                                                                                                                      下午9:52:45
 error  in ./node_modules/async-validator/dist-web/index.js

Module parse failed: Unexpected token (847:18)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| class Schema {
|   // ========================= Static =========================
>   static register = function register(type, validator) {
|     if (typeof validator !== 'function') {
|       throw new Error('Cannot register a validator by type, validator is not a function');

 @ ./node_modules/element-plus/es/components/form/index.js 6:0-45 453:28-42
 @ ./node_modules/element-plus/es/components/index.js
 @ ./node_modules/element-plus/es/index.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://192.168.1.228:8080&sockPath=/sockjs-node (webpack)/hot/dev-server.js ./src/main.js

我也遇到这个问题，降到beta17就可以了，初步查了一下，是element-plus依赖的async-validator版本引起的，现在卸载elementui-plus 重新安装，看一下package-lock.json里面async-validator版本号是不是变成4.0.7了，如果还是4.0.5得话，你就手工改好了。

    "async-validator": {
      "version": "4.0.7",
      "resolved": "https://registry.npmjs.org/async-validator/-/async-validator-4.0.7.tgz",
      "integrity": "sha512-Pj2IR7u8hmUEDOwB++su6baaRi+QvsgajuFB9j95foM1N2gy5HM4z60hfusIO0fBPG5uLAEl6yCJr1jNSVugEQ=="
    },

卸载 element-plus
重新安装，通过 vue add element-plus 来安装

你是不是用了最新的beta20，如果是新项目，改低点就行了