[Vuejs]-Problem with Vee-validate and Vuetify, Error in render: "TypeError: Cannot read property '$vuetify' of null"

You can’t use this in templates

:label="this.$vuetify.lang.t('$vuetify.campaign.link')"
        ^^^^

just remove this and your label should looks like this:

:label="$vuetify.lang.t('$vuetify.campaign.link')"