Unable to set up the personas web app [dev mode]

[sansyrox]

Describe the bug
I have sourced the credentials and set up an env.local file and I get two errors

Current behavior
Error 1

Error
    at captureStackTrace (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/internal/helpers/capture-stack-trace.js:13:23)
    at console.error (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/globals/intercept-console-error.js:51:62)
    at getUid (webpack-internal:///(app-pages-browser)/./src/app/page.tsx:276:21)
    at async handleIntegrationClick (webpack-internal:///(app-pages-browser)/./src/app/page.tsx:807:19)

Error 2

Error: Mixpanel error: "Bad HTTP status: 0 "
    at createUnhandledError (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/internal/helpers/console-error.js:23:19)
    at handleClientError (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/internal/helpers/use-error-handler.js:42:98)
    at console.error (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/globals/intercept-console-error.js:53:56)
    at error (webpack-internal:///(app-pages-browser)/./node_modules/mixpanel-browser/dist/mixpanel.module.js:4607:37)
    at MixpanelLib.report_error (webpack-internal:///(app-pages-browser)/./node_modules/mixpanel-browser/dist/mixpanel.module.js:11097:21)
    at req.onreadystatechange (webpack-internal:///(app-pages-browser)/./node_modules/mixpanel-browser/dist/mixpanel.module.js:9690:29)

Expected behavior
No errors. And I should be able to connect it.

Additional context
Add any other context about the problem here.

[mdmohsin7]

You'll need to add mixpanel key as well to fix this issue. Pls feel free to open a PR updating the readme or making mixpanel optional