I’m seeing a persistent Antigravity Agent failure on Windows where every Agent run terminates immediately with:
Trajectory ID: 7a89f169-d9a0-43b7-a8cc-32…
Error: HTTP 400 Bad Request
Sherlog:
TraceID: 0xe854f6448…
Headers: {“Alt-Svc”:[“h3=\”:443\“; ma=2592000,h3-29=\”:443\“; ma=2592000”],“Content-Length”:[“127”],“Content-Type”:[“text/event-stream”],“Date”:[“Tue, 04 Aug 2026 17:33:21 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=677”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“e854f64485…”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}
{
“error”: {
"code": 400, "message": "Request contains an invalid argument.", "status": "INVALID_ARGUMENT"}
}
Everything was working normally yesterday, August 3rd as well as this morning, however suddenly, in the middle of responding to a query, it just terminated due to the above error. Now I can not get any agent to perform any tasks across any of my projects in both Antigravity 2.0 or Antigravity IDE. My agents in Gemini still work normally.
What is this issue with “Cloud companion” and how can I fix it?