"Error in mounted hook" when hiding content on custom theme

[clorl]

My use case is simple : creating a custom theme and hiding the default content if you're on the homepage.
In components/page.vue, I just need to add this

    homepage(v-if='path === `home`')
    v-main(v-else, ref='content')

Assuming I import homepage component in page.vue.
Whenever I do this, I get this error

[Vue warn]: Error in mounted hook: "TypeError: env.container is undefined"

found in

---> <Page> at client/themes/default/components/page.vue
       <Root>

Without knowing the exact stack trace because of webpack I believe