[BUG] Antigravity 2.0 - Persistent Error #3501 and Infinite Model Loading after Gmail Address Change

Google Antigravity
,
1

Hi team,

I am completely locked out of using Antigravity 2.0 following a recent primary Gmail address change on my Google account. I am a personal/free-tier user, but the application backend seems to be trapped in an authentication/entitlement loop.

Symptoms:

  1. Initial Block (Error #3501): Upon installing and updating to Antigravity 2.0, the app threw a persistent popup stating: “You do not have a valid license of this product. Please contact your administrator to request a license… Error (#3501)”.

  2. Infinite Loading Spinner: After manually purging local session storage/app storage files to clear the lock, I am now able to get the application window to open and log in via the browser. However, the Model Selection page completely hangs on an infinite loading spinner and fails to populate any available models (Gemini Flash/Pro).

Root Cause Trigger:

This behavior began immediately after I changed my primary Gmail address. It appears the Antigravity OAuth/IAM backend is failing to recognize my personal tier entitlement under the new email alias, or it’s hitting a token/ID mismatch during the server-side handshake, causing the model registry network stream to hang silently.

Troubleshooting Already Attempted (Did Not Work):

  • Revoked third-party app access tokens via my Google Account Security panel.

  • Completely wiped local caches, logs, and storage directories (%APPDATA%\Antigravity on Windows / ~/Library/Application Support/Antigravity on Mac).

  • Verified no global Google Cloud environment variables (GOOGLE_APPLICATION_CREDENTIALS, etc.) are active on my machine.

  • Tested with an entirely separate, clean secondary Gmail account—the secondary account works perfectly and loads models instantly, which proves the bug is isolated to my primary account’s email migration state on your backend.

Environment Details:

  • Antigravity Version: 2.0

  • Account Type: Personal / Consumer Gmail (recently updated address)

Could a forum admin or engineer look into my account routing profile or force an identity/entitlement re-sync on the backend for my email? Happy to provide my specific email address privately if an engineer reaches out.