Agent not responding on specific workspace - "agent state not found" error

Google Antigravity
1

My agent stopped responding on a specific workspace. The agent loads but never replies to messages — it saves them in history but produces no output.

In the DevTools console I see this error:

[consumeAgentStateStream] streamAgentStateUpdates error: ConnectError: [unknown] agent state for conversation XXX not found

Also:

Failed to load resource: the server responded with a status of 500
GetAgentScripts

The issue only affects this one workspace. Other workspaces work fine. I tried:

  • Clearing cache (Cache, CachedData, Code Cache folders in AppData)

  • Deleting conversation .pb files in .gemini/antigravity/conversations

  • Renaming the workspace folder

  • Restarting Antigravity

  • Switching models (Gemini 3.1 Pro, Claude Opus)

Nothing worked. It seems the agent session is corrupted server-side for this specific workspace path.

OS: Windows 11
Version: Antigravity 1.22.2

Thanks