Hi Google team, posting here because even the in-app “Provide Feedback” form is stuck on “Submitting…” indefinitely (same broken pipeline as the agent chat).
Environment
- Antigravity 1.23.2
- macOS 26.4 (arm64, Apple Silicon)
- Pro-tier paying account
- No VPN / no proxy configured on the Mac
Symptom
Agent does not respond to any prompt. User message appears, no spinner, no error in UI, no assistant bubble rendered. Backend actually succeeds: SendUserCascadeMessage → 200 OK, StreamAgentStateUpdates → 200 OK with ~4.7kB body, completion sound antigravityCascadeDone.mp3 plays. UI just doesn’t render the response. Repro with both Gemini 3 Flash and Gemini 3.1 Pro High.
DevTools Console errors (persistent)
LR: Language server has not been started![consumeAgentStateStream] ConnectError: [unknown] agent state for conversation <uuid> not found[Extension Host] FetchError: Unleash Repository error: request to http://localhost:51113/proxy/unleash/client/features failed
Root cause hypothesis: port desynchronization
language_server_macos_arm process IS running and listening on ports like 51232, 51233, 51259, 51270, 51284. But the extension tries to reach the Unleash proxy on port 51113 (or similar) that is never actually opened by the LS.
Troubleshooting already performed (all ineffective)
- Complete app reinstall from fresh 1.23.2 .dmg
- Full wipe of
~/Library/Application Support/Antigravity/(all caches, Local Storage, Session Storage, state.vscdb, workspaceStorage) - Full wipe of
~/.antigravity/(let Antigravity recreate from scratch) - Disabled all 21 third-party extensions in
~/.antigravity/extensions/ - Multiple language_server_macos_arm process restarts
- Multiple sign out + 30s wait + sign in cycles with same Pro account
- Tested both “Plan” mode and plain mode
Logs zip ready to share upon request. Thanks for any investigation.