You are required to include the specified icon library (even when using the default icons from Material Design Icons ). This can be done by including a CDN link or importing the icon library into your application.
npm install @mdi/font -D
And then then add to the src/plugins/vuetify.js
import '@mdi/font/css/materialdesignicons.css' // Ensure you are using css-loader import { createVuetify } from 'vuetify'
export default createVuetify({ icons: { defaultSet: 'mdi', // This is already the default value - only for display purposes }, })