# Google Sign-In works on your machine's builds and fails on CI/EAS builds

> GoogleSignin.configure() uses the web client ID, which existed only in a local .env.

Web page: https://davidewins.com/errors/google-signin-web-client-id-undefined

Expo. Confirmed fix, 26 September 2026.

Versions: @react-native-google-signin, EAS

There is no error message for this one, only the symptom in the title.

## Cause

`GoogleSignin.configure()` uses the web client ID, which existed only in a local .env. Any build or update made without that file shipped `undefined`.

## Fix

Put every EXPO_PUBLIC_ value the app needs in the EAS environment (or eas.json profile), then rebuild. Grep the shipped bundle for the value to confirm.

## More Expo errors

- [Dev client red screen: No script URL provided (launcher never appears)](https://davidewins.com/errors/expo-dev-client-no-script-url-precompiled)
- [Bundle fails with Invalid expression encountered after supabase-js update](https://davidewins.com/errors/supabase-js-hermes-invalid-expression)
- [After upgrading to SDK 57, expo-font / expo-image / expo-asset config is missing](https://davidewins.com/errors/expo-sdk57-plugins-must-be-declared)
- [SDK upgrade: export dies with SyntaxError after expo install --fix](https://davidewins.com/errors/expo-install-fix-leaves-babel-preset-stale)
- [expo-doctor wants TypeScript 6 but tsc reports hundreds of errors](https://davidewins.com/errors/typescript-6-explodes-typecheck-expo)

[Search all errors](https://davidewins.com/errors)