Antigravity Login Loop – OAuth Redirect Fails (Windows Protocol Handler Issue)

Google Antigravity
,
1

I am currently unable to log into Google Antigravity due to a persistent authentication loop.

After signing in via the browser, the authentication process appears to complete successfully. However, the redirect back to the IDE using the custom protocol (antigravity://oauth-success) fails.

As a result, the IDE never receives the authentication token, and I remain stuck on the login screen.

Observed Behavior:

  • Browser login completes successfully

  • Redirect to antigravity://oauth-success is triggered

  • The Antigravity IDE does not capture the token

  • User remains unauthenticated in the IDE

Expected Behavior:

After successful browser authentication, the IDE should receive the token via the protocol handler and complete the login process.

Additional Issue:

The alternative login option “Use a GCP project instead” also becomes unresponsive/freezes, making it impossible to access the tool through any available method.

Environment Details:

2

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Same here plus no i could see any models too.
i swithced accounts tried login with them same. authentication is successfull but not logged in ide.