Can't use Ionic with Vue 3 CLI

Using this main.js:

import { createApp } from 'vue'
import App from './App.vue'
import './registerServiceWorker'
import router from './router'
import Ionic from '@ionic/vue';
import '@ionic/core/css/ionic.bundle.css';
import './ionic-variables.css';

const app = createApp(App);
app.use(router);
app.use(Ionic);
app.config.productionTip = false
app.mount('#app');

I always get this error:

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