Persistent HTTP 400 "Invalid project resource name projects/" in Antigravity & Cockpit Tools - Google AI Pro Subscriber

Google Antigravity
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Hi everyone,

I’m experiencing a persistent HTTP 400 Bad Request error when using Antigravity (and the desktop Cockpit Tools) with my active Google AI Pro subscription.

Error Details:

  • Error: Invalid project resource name projects/
  • Status: INVALID_ARGUMENT (code 400)
  • Full error message: “Invalid project resource name projects/”
  • Model: Gemini 3 Flash
  • Last used: 2026/4/6
  • Trace ID (from Cockpit Tools): 1148000f-efcc-4d85-a836-1fecc57…

(Attached screenshots and full error log from Cockpit Tools)

What I’ve already tried (all without success):

  • Signed out/in multiple times
  • Created new Google Cloud projects and selected them
  • Turned off all Proxy settings
  • Clean reinstall of Antigravity and Cockpit Tools
  • Deleted local config folders (%APPDATA%\Antigravity)
  • Enabled 2FA
  • Tried a fresh Gmail account (still the same issue on the new account)

The agent always terminates with “Agent execution terminated due to error.”

This seems to be an account provisioning issue on Google’s backend (project ID is empty even though I’m a paid Pro user).

Has anyone found a working solution recently?
Especially:

  • Did Google support do a backend reset for you?
  • Is there any new workaround in April 2026?

Any help or official escalation would be greatly appreciated. Thanks!

Environment:

  • OS: Windows
  • Antigravity version: latest
  • Cockpit Tools version: latest
  • Plan: Google AI Pro
    Trajectory ID: 3aa1149f-d80b-47c2-b70f-e88fac78…
    Error: HTTP 400 Bad Request
    Sherlog:
    TraceID: 0x14dd7048d024…
    Headers: {“Alt-Svc”:[“h3=“:443”; ma=2592000,h3-29=“:443”; ma=2592000”],“Content-Length”:[“382”],“Content-Type”:[“text/event-stream”],“Date”:[“Sun, 05 Apr 2026 16:39:36 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=252”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“14dd7048d024ff66”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}

{
“error”: {
“code”: 400,
“details”: [
{
“@type”: “type.googleapis.com/google.rpc.BadRequest”,
“fieldViolations”: [
{
“description”: “Invalid project resource name”,
“field”: “name”
}
]
}
],
“message”: “Invalid project resource name projects/”,
“status”: “INVALID_ARGUMENT”
}
}

CC: @moderator - requesting backend provisioning reset for this account.

Persistent HTTP 400 "Invalid project resource name projects/" — Empty cloudaicompanionProject after ESET firewall removal (Windows 11, Antigravity 1.22.2, AI Pro)
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Thank you for approving my post and lifting the hold.

My issue is still not resolved after 2+ days.

  • Google AI Pro account: s.....@gmail.com
  • Error: HTTP 400 Invalid project resource name projects/ (INVALID_ARGUMENT)
  • Trace ID: 1148000f-efcc-4d85-a836-1fecc577
  • Already tried: new projects, clean reinstall, delete %APPDATA%\Antigravity, proxy off, 2FA, etc.

Could the team please perform a backend provisioning reset for my account?

I have attached screenshots and logs in the original post.
Thank you!

3

Hi @shlshen
Welcome to the Google AI Forum!!!

Thank you for bringing these concerns to our attention. We have escalated the issue to our internal teams for a thorough investigation.

To ensure our engineering team can investigate and resolve these issues effectively, we highly recommend filing bug reports directly through the Antigravity in-app feedback tool. You can do this by navigating to the top-right corner of the interface, clicking the Feedback icon, and selecting Report Issue.