I had facing this error with Nuxt3, in my deployed Vercel app. Because library implemented @web3auth/... has some polyfill issues to solve.

First I needed to install packages pnpm add --save-dev buffer process , Then I call them in my layout by default.

<script type="module" lang="ts"> // Global node polyfill. import { Buffer } from "buffer"; import process from "process"; window.global = window; window.Buffer = Buffer; window.process = process; </script>