Few days I'm trying to fix this problem but still didn't find solution. Does anyone know what could be a problem?
I use version "8.0.0-rc.1" because this version only support vue 3 for now.

Property 'use' does not exist on type 'VueConstructor'
Property 'set' does not exist on type 'VueConstructor'

Second question, how can I use mixins inside@option