"You may forget to apply app.use(head)" about head HOT 2 CLOSED

try like this

app = createApp(App).use(router).use(head).mount("#app");

from head.

In main.js file
import { createHead } from '@vueuse/head'

you can bind createHead to your vue app like so:

const app = createApp(App).use(store).use(router).use(createHead())

app.mount('#app')

You can also assign createHead() function to a variable before asking Vue to use it. i.e

const head = createHead()

then

const app = createApp(App).use(store).use(router).use(head)

from head.