package.json (When my packages were as under)
"dependencies": {"@nuxtjs/axios": "^5.13.6","core-js": "^3.15.1","nuxt": "^2.15.7","vuetify": "^2.5.5"},"devDependencies": {"@nuxtjs/vuetify": "^1.12.1"}nuxt.config.js (Following helped me)
build: { babel: { plugins: [ ['@babel/plugin-proposal-private-property-in-object', { loose: true }] ], },}