Antigravity terminated due to error

Google Antigravity
1

Trajectory ID: b73d8d1e-4b31-4668-ad5f-**
Error: HTTP 403 Forbidden
Sherlog:
TraceID: 0x1862083f3**
Headers: {“Alt-Svc”:[“h3=”:443"; ma=2592000,h3-29=“:443”; ma=2592000"],“Content-Length”:[“896”],“Content-Type”:[“text/event-stream”],“Date”:[“Sun, 27 Sep 2026 02:44:21 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=754”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“1862083f3**”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}

{
“error”: {
“code”: 403,
“details”: [
{

“metadata”: {
“error_number”: “1001”,
“uiMessage”: “true”
},
“reason”: “SUBSCRIPTION_REQUIRED”
},
{

“links”: [
{
“description”: “Learn more”,

}
]
}
],
“message”: “You do not have a valid license of this product. Please contact your administrator to request a license. If you are not an enterprise user and believe you are receiving this message as an error, please try using the latest version and logging in again. (#3501)”,
“status”: “PERMISSION_DENIED”
}
}

2

Hi @souvick_bose,

Welcome to the Forum.

Based on the debug log you shared, your agent terminated because the backend returned Error #3501 (HTTP 403 SUBSCRIPTION_REQUIRED). This occurs either when your sign-in session is treated as requiring an enterprise/business license with no active license attached, or when the connection is blocked due to regional availability restrictions (Official FAQ).

To switch back to your personal account in Antigravity IDE (v2.5.5), please follow these steps:

  1. Update & Reset Your Cached Session:

    • Ensure you are on the latest version of Antigravity IDE (v2.5.5) from antigravity.google/download.
    • Open the Command Palette (Ctrl+Shift+P on Windows/Linux or Cmd+Shift+P on macOS) and run Antigravity: Reset Onboarding to sign out and restart the sign-in flow.
    • When prompted to sign in, select your personal @gmail.com account (not an Enterprise, Workspace SSO, or Google Cloud option).

  2. Revoke Stale OAuth Grants & Clear Local Cache (If #3501 Persists):

    • Visit Google Account Connections, remove access for Google Antigravity / Google Cloud Code, and close Antigravity IDE completely.
    • Delete your local cached session folders before signing back in:
      • Windows: %APPDATA%\Antigravity and %USERPROFILE%\.gemini
      • macOS: ~/Library/Application Support/Antigravity and ~/.gemini/
      • Linux: ~/.config/Antigravity/ and ~/.gemini/

  3. Verify Region & Account Eligibility (Official FAQ):