Stuck in "Further action is required" verification loop - tested multiple accounts, all troubleshooting done

Google Antigravity
1

Steps to reproduce:

  1. Open Antigravity IDE and click “Sign in”
  2. Complete Google authentication in browser successfully (via Passkey/Windows Hello)
  3. Browser/app shows “You have successfully authenticated”
  4. IDE immediately shows: “Further action is required to use Antigravity.
    Please verify your account, then sign in again to continue.”
  5. Clicking “Verify” completes re-authentication successfully, but the IDE
    loops back to the same blocking screen every time

Expected behavior:
After successful Google authentication, the IDE should grant access to
Antigravity normally.

Actual behavior:
Stuck in an indefinite verification loop. The IDE never proceeds past this
screen regardless of how many times authentication is repeated.

IMPORTANT — Tested with multiple Google accounts:
I tested this issue with a second, completely different Google account
(never previously used with Antigravity) from the same device/network.
The exact same “Further action is required” loop occurred. This strongly
suggests the issue is NOT specific to a single account, but is instead
related to my network environment (exit IP) or device fingerprint being
flagged, rather than an account-level restriction.

Troubleshooting already performed (all unsuccessful):

  • Confirmed primary Google account region/country is set to United States
    via payments.google.com
  • Confirmed account type is Personal (not Google Workspace)
  • Confirmed account age verification is 18+
  • Confirmed 2-Step Verification is fully and correctly configured:
    Authenticator app (added 612 days ago), Google prompt (1 device),
    backup codes (9 available), phone number, all showing as active/green
  • Confirmed Passkey (Windows Hello, created Feb 7 2026) shows a successful
    recent authentication at the exact time of the failed Antigravity login attempt
  • Tested with a second, separate Google account — same error occurs
  • Cleared all local Antigravity cache/config folders
    (%APPDATA%\Antigravity, %LOCALAPPDATA%\Antigravity) and performed a
    clean reinstall — issue persists
  • Used “Antigravity: Reset Onboarding” command — issue persists
  • Confirmed default browser is Chrome
  • Cleared Google/Antigravity related cookies before retrying — issue persists

Network environment:
Located in mainland China. Direct access to Google services is not possible
without a proxy, so I connect via a VPN in global TUN mode (not split-tunnel/
rule-based routing) to ensure all traffic including OAuth callbacks routes
consistently through the same, stable exit node. I do not switch nodes during
the login process. Given that the issue reproduces across multiple accounts
on this same network path, I suspect the exit IP or device may be flagged
by an automated risk/abuse detection layer.

Environment details:

  • OS: Windows Server 2022 / Windows 10 Pro for Workstations, version 22H2
  • Antigravity IDE version: 2.1.1
  • VSCode OSS version: 1.107.0 (user setup)
  • Commit: e0b7a2bcf575cfba10528c4e7c10bd3ce2d77
  • Electron: 39.2.3
  • Primary account email: s......com@gmail.com
  • Most recent failed attempt: [提交当天日期，如 July 13, 2026]

Given the issue affects multiple accounts on this same network/device, I
suspect this may be a network-level or device-level flag rather than an
account-specific restriction. I would appreciate guidance on whether this
can be manually reviewed, or confirmation of what triggers this check so
I can avoid it going forward. Happy to provide additional screenshots,
logs, or test from an alternate network if that would help diagnose the issue.