404 Not Found on proxy/unleash/frontend when logging in with PRO Account

Google Antigravity
1

I am experiencing a persistent login issue with my Student PRO account. While my regular Gmail account can log in and function normally, my Student PRO account (Google Workspace for Education) fails to complete the authentication process within the software.

Steps to Reproduce:

  1. Open Antigravity and click “Sign in”.

  2. Complete the OAuth process in the browser (Google shows “Access granted”).

  3. The software does not react to the callback and remains in an “Unauthenticated” state.

Observed Behavior (Console Logs): The developer console reports multiple 404 errors:

  • POST https://127.0.0.1:6798/proxy/unleash/frontend 404 (Not Found)

  • Unleash: Fetching feature toggles did not have an ok response

  • [AntigravityUnleashService] [object Object]

Troubleshooting Performed:

  • Cleared %APPDATA%\Antigravity cache and local storage.

  • Tested with a mobile hotspot to bypass school network/firewalls.

  • Tested with Incognito mode in the browser.

  • Verified that the regular “Free” account works perfectly on the same machine/network.

Environment:

  • OS: Windows

  • Account Type: Google Workspace for Education (PRO subscription active)

  • Status: Google Account settings show that Antigravity has been granted access, but the software backend returns 404 for this specific user ID/domain.

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