Cannot find module 'vuetify-loader/lib/plugin'

Question

When I load vuetify via the vue-cli3, I get an error when i do npm run serve, saying there is a missing loader.

Docs etc and searches have come up blank.

This is

Answer 1

Run npm cache clean --force. It should clear your npm cache. For reference: https://github.com/npm/npm/issues/19072#issuecomment-345555468