Title: HTTP 500 Internal Server Error on all chat requests for a specific account

Google Antigravity
1

Description:

I’m experiencing persistent HTTP 500 errors when using the chat/Cascade feature in Antigravity IDE. The issue is account-specific — switching to a different
account on the same machine resolves the problem immediately.

Environment:

  • Antigravity IDE version: 0.2.0 (Windows 11)
  • Region: China

Symptoms:

  • Every chat request returns 500 Internal Server Error instantly (~86-95ms response time), suggesting the server rejects the request before any model
    processing occurs.
  • The Antigravity Cockpit plugin’s “Wake Up” feature (which calls /v1internal:streamGenerateContent) works normally with the same account — only the
    Cascade/Trajectory-based chat is broken.
  • Switching to a different account on the same IDE instance works fine.
  • The issue persists across different workspaces/folders.

Troubleshooting already performed:

  • Cleared local session/storage cache (Session Storage, Local Storage, workspaceStorage) — no effect
  • Re-logged in / refreshed OAuth token — no effect
  • Switched workspaces — no effect
  • Confirmed other accounts work fine on the same machine

Error samples:

Request 1:

  • Trajectory ID: 5d4258f8-f0a4-49d1-b500-a46a9f5bbe6d
  • TraceID: 0xdaf381734fab082
  • Time: 2026-05-09 08:21:30 UTC

Request 2:

  • Trajectory ID: 3885ab3d-fdfd-4e04-82bd-830c2744
  • TraceID: 0x74015d8ef98a2
  • Time: 2026-05-09 08:55:02 UTC

Conclusion:
The issue appears to be server-side state corruption tied to this specific account’s Trajectory/Cascade processing pipeline. The account can successfully call
streamGenerateContent (via Cockpit), but all Cascade chat requests fail with 500 before reaching model inference. Please investigate and reset the
account-level Trajectory state if applicable.

2

Has anyone found a solution?

3

Hi @zhongqi_wang,

Welcome to the Forum,

Please try installing the latest version from Google Antigravity then let us know if the issue continues and provide the latest Trajectory ID for troubleshooting.

4

Hi @Coc_Super,

This error often happens intermittently, so please attempt to retry or select a different model from the selector. If the problem continues, could you specify which model you are using when this arises?

5

@chunduriv

Trajectory ID: 7f436186-96da-412b-918b-3dc529d7f…
Error: HTTP 500 Internal Server Error
Sherlog:
TraceID: 0x923dd09cfa6d8…
Headers: {“Alt-Svc”:[“h3=”:443"; ma=2592000,h3-29=“:443”; ma=2592000"],“Content-Length”:[“109”],“Content-Type”:[“text/event-stream”],“Date”:[“Tue, 12 May 2026 08:45:48 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=430”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“923dd09cfa6d8…”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}

{
“error”: {
“code”: 500,
“message”: “Internal error encountered.”,
“status”: “INTERNAL”
}
}

image
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“I’m already using the latest version of antigravity — see the screenshot”