Calling API deployment returns Worker exited prematurely: signal 9 (SIGKILL) Job: XXX error

Describe the bug

Calling API deployment returns Worker exited prematurely: signal 9 (SIGKILL) Job: XXX error.

To reproduce

I'm using Docker environment on macOS via Docker Desktop for Mac. I've setup test project as per Start User guide and make a call to API deployment. API call returns this error after some time:

{
  "message": {
    "execution_status": "ERROR",
    "status_api": "/deployment/api/mock_org/b2b-invoice-process/?execution_id=caf99a46-aff6-4648-bdec-6361ca88748e",
    "error": "Worker exited prematurely: signal 9 (SIGKILL) Job: 5.",
    "result": null
  }
}

I did similar installation on two Macs, I've tried Postman and curl calls: result is the same.

Expected behavior

API should return either a processing result or error description good enough to indicate how to resolve the problem.

Environment details

• Version: Docker compose environment. Repo commit hash 9662435635bcb37d77697a6496ee0fff3afa36d3.
• macOS: 15.3.2
• Docker desktop: 4.37.2 (179585)
• Docker version 27.4.0
• Docker Compose version v2.31.0-desktop.2

Additional context

Follow exactly the Quick start process up to Making an API call chapter

Screenshots

None. JSON returned from Unstract is above.

Start by reproducing the issue using the Quick start guide through the Making an API call chapter, then inspect the Docker Compose worker logs around the API deployment request and SIGKILL. Done means identifying why the worker exits and making the API return a processing result or an actionable error description.