HTTP 500 Internal Server Error with Agent Platform API (Enterprise Plan)

Google Antigravity
1

Hi everyone,

I am currently encountering an HTTP 500 Internal Server Error and am looking for some guidance.

Here are the details of my environment and configurations:

  • Plan: Enterprise Plan

  • GCP Setup: Enabled Agent Platform API and configured IAM settings properly.

  • Antigravity Settings: Specified the GCP Project ID under Settings > Permission > [Dev] GCP Project ID.

Despite these settings, I receive the following error response:

Trajectory ID: [REDACTED]
Error: HTTP 500 Internal Server Error
Sherlog: TraceID: [REDACTED]
Headers: {“Alt-Svc”:[“h3=\”:443\“; ma=2592000,h3-29=\”:443\“; ma=2592000”],“Content-Length”:[“109”],“Content-Type”:[“text/event-stream”],“Date”:[“Fri, 29 May 2026 03:45:06 GMT”],“Server”:[“ESF”],“Server-Timing”:[“gfet4t7; dur=632”],“Vary”:[“Origin”,“X-Origin”,“Referer”],“X-Cloudaicompanion-Trace-Id”:[“[REDACTED]”],“X-Content-Type-Options”:[“nosniff”],“X-Frame-Options”:[“SAMEORIGIN”],“X-Xss-Protection”:[“0”]}
{ “error”: { “code”: 500, “message”: “Internal error encountered.”, “status”: “INTERNAL” } }

Is anyone else experiencing a similar issue? If you have encountered this before and found a workaround or a fix, could you please share how you resolved it?

Thank you in advance for your help!