[Urgent] Google One AI Premium User: "Unexpected issue setting up your account" on Windows 11

Hello Google Antigravity Team,

I am reporting a persistent login failure that is preventing me from using Antigravity on Windows 11. Despite being a Google One AI Premium (Gemini Advanced) subscriber, I am completely blocked from accessing the service.

Problem Description:
After clicking “Sign in with Google,” I am redirected to the browser where authentication is successful. However, upon returning to the application, it gets stuck and displays the following error:
“There was an unexpected issue setting up your account. We apologize for the inconvenience. Please try again later.”

Environment:

  • OS: Windows 11

  • Account Type: Google One AI Premium / Gemini Advanced Subscriber

  • Region: Brazil

Troubleshooting steps I’ve already tried:

  1. Complete uninstallation and clean reinstallation of the app.

  2. Deleted local data folders (.antigravity and %APPDATA%\Antigravity).

  3. Cleared browser cache and cookies.

  4. Verified system time and timezone synchronization.

  5. Removed Antigravity access from my Google Account security settings and re-authorized.

  6. Tested on different network connections (Wi-Fi and mobile hotspot).

None of these steps resolved the issue. As a paying subscriber, this is quite frustrating as it seems to be a server-side account provisioning error or a subscription sync mismatch on Google’s end.

I’ve seen many other users reporting this exact same behavior recently. Could you please investigate if there is a known bug affecting account setups for AI Premium users?