[Bug] Google OAuth completes but login fails — TypeError: Do not know how to serialize a BigInt

Google Antigravity
1

Platform: Windows
App: Antigravity (latest version)
Account region: India (IN)

**
Problem**
Google sign-in authentication completes successfully on Google’s side, the browser shows “You have successfully authenticated”, and the antigravity://oauth-success redirect triggers correctly — but the app never logs me in. The failure happens during the Antigravity account setup step, after the OAuth callback.

Error found in logs

TypeError: Do not know how to serialize a BigInt

What I’ve already tried

  • Google sign-in multiple times through the app
  • Manual protocol trigger via PowerShell (antigravity://auth)
  • Restarting Antigravity
  • Closing extra auth tabs in the browser
  • Incognito window for login
  • Checking Google account security settings and region/payments profile
  • Removing and re-granting Antigravity access from Google account permissions
  • Trying other Google accounts (they work normally on the same machine)
  • Running Antigravity with a clean profile / fresh user data
  • Clearing local app data
  • Full reinstall of Antigravity

What we confirmed

  • :white_check_mark: Google authentication succeeds
  • :white_check_mark: antigravity://oauth-success redirect triggers correctly
  • :cross_mark: App account setup fails after the callback with the BigInt serialization error

The BigInt serialization error suggests the app is trying to process a value from Google’s token/profile response that contains a BigInt (possibly the Google account ID), and the JSON serialization in the app is failing on it. This seems like a bug on the app side rather than an account or network issue.

Has anyone else faced this? Any workaround would be appreciated.

1 Like
2

On Archlinux, I also encountered the same issue. The error stack I received is as follows. The package I used is aur/antigravity, and the software version is the latest 1.20.6-1.

```
[main 2026-03-18T08:25:46.131Z] [uncaught exception in main]: TypeError: Do not know how to serialize a BigInt
[main 2026-03-18T08:25:46.132Z] TypeError: Do not know how to serialize a BigInt
at JSON.stringify ()
at vD (file:///opt/Antigravity/resources/app/out/main.js:62:11765)
at nve.o (file:///opt/Antigravity/resources/app/out/main.js:62:14636)
at nve.m (file:///opt/Antigravity/resources/app/out/main.js:62:14511)
at wW.value (file:///opt/Antigravity/resources/app/out/main.js:63:265)
at jt.C (file:///opt/Antigravity/resources/app/out/main.js:61:2348)
at jt.D (file:///opt/Antigravity/resources/app/out/main.js:61:2418)
at jt.fire (file:///opt/Antigravity/resources/app/out/main.js:61:2635)
at wW.value (file:///opt/Antigravity/resources/app/out/main.js:59:7100)
at jt.C (file:///opt/Antigravity/resources/app/out/main.js:61:2348)
at jt.fire (file:///opt/Antigravity/resources/app/out/main.js:61:2566)
at tce.R (file:///opt/Antigravity/resources/app/out/main.js:1476:45593)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async file:///opt/Antigravity/resources/app/out/main.js:1476:41998
[main 2026-03-18T08:25:46.132Z] [uncaught exception in main]: TypeError: Do not know how to serialize a BigInt
[main 2026-03-18T08:25:46.132Z] TypeError: Do not know how to serialize a BigInt
at JSON.stringify ()
at vD (file:///opt/Antigravity/resources/app/out/main.js:62:11765)
at nve.o (file:///opt/Antigravity/resources/app/out/main.js:62:14636)
at nve.m (file:///opt/Antigravity/resources/app/out/main.js:62:14511)
at wW.value (file:///opt/Antigravity/resources/app/out/main.js:63:265)
at jt.C (file:///opt/Antigravity/resources/app/out/main.js:61:2348)
at jt.D (file:///opt/Antigravity/resources/app/out/main.js:61:2418)
at jt.fire (file:///opt/Antigravity/resources/app/out/main.js:61:2635)
at wW.value (file:///opt/Antigravity/resources/app/out/main.js:59:7100)
at jt.C (file:///opt/Antigravity/resources/app/out/main.js:61:2348)
at jt.fire (file:///opt/Antigravity/resources/app/out/main.js:61:2566)
at tce.R (file:///opt/Antigravity/resources/app/out/main.js:1476:45593)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async file:///opt/Antigravity/resources/app/out/main.js:1476:41998
```

If anyone can provide further information or a problem report, I would be very grateful.