[Bug] Multiple features broken after clean reinstall — Unleash service 404, no accounts loaded (Windows)

Google Antigravity
1

Environment

Component Version
Antigravity 1.20.5
VSCode OSS 1.107.0 (user setup)
Commit 4603c2a412f8c7cca552ff00db91c3ee787016ff
Date 2026-03-07T01:34:20.929Z
Electron 39.2.3
Chromium 142.0.7444.175
Node.js 22.21.1
V8 14.2.231.21-electron.0
OS Windows_NT x64 10.0.26200
Language Server CL 879885162

Symptoms

After a clean reinstall of Antigravity, the following features are broken:

  1. Past conversations not showing — sidebar is empty, even though .pb files exist in ~/.gemini/antigravity/conversations/

  2. Slash commands (/) not appearing — .agent/workflows/ has 17 valid workflow files, assistant can use them, but UI autocomplete shows nothing

  3. MCP servers fail to load — Settings page shows “Failed to load MCP servers”

  4. Skills configuration error — “Failed to load skills paths: ConnectError: [unknown] Failed to fetch”

Root cause from DevTools Console

The Unleash feature toggle service is returning 404 on every request, causing a cascade of failures:

POST https://127.0.0.1:51118/proxy/unleash/frontend 404 (Not Found)
Unleash: Fetching feature toggles did not have an ok response
[AntigravityUnleashService] [object Object]

This repeats every ~30 seconds indefinitely.

Other critical errors:

[Extension Host] Failed to update user status Error: LanguageServerClient must be initialized first!

[Extension Host] Error retrieving Unleash sample rate Error: UnleashProvider must be initialized first!

[createInstance] xoe depends on UNKNOWN service agentSessions.

[AccountsRefresh] Loaded 0 accounts, tools available: false

Quota Update: No models available

The initialization chain appears to be:

  1. Unleash service fails (404) → feature flags unavailable

  2. UnleashProvider can’t initialize → LanguageServerClient can’t initialize

  3. No accounts loaded → tools available: false

  4. Quota Update: No models available persists across all refresh cycles

  5. agentSessions service is completely missing → UI features that depend on it fail

What I’ve tried

  1. Complete uninstall of Antigravity

  2. Deleted ~/.gemini/, ~/.antigravity/, AppData/Roaming/Antigravity/

  3. Reinstalled from scratch

  4. Reopened workspace, restarted application multiple times

  5. The AI assistant itself works (chat is functional), but the UI features above are all broken

Expected behavior

  • Unleash endpoint should not return 404

  • Past conversations should appear in sidebar

  • / should show workflow autocomplete

  • MCP servers and skills should load successfully

Has anyone else experienced this? Is the Unleash proxy endpoint known to be broken in v1.20.5?

2

Same problem, everything was working before the clean reinstall.

3

I´m having the MCP servers fail to load / Skills configuration error too.

Did anyubody found a solution?