Attempt 2 (workspace screen-result.json, pid 16948):
{
  "event": "summary",
  "scope": "primary display of the current process desktop",
  "intervalSeconds": 2,
  "durationSeconds": 10,
  "savedImages": 0,
  "complete": false,
  "mediaSaved": false,
  "images": [],
  "errorType": "CaptureFailure",
  "error": "[Errno 5] BitBlt(primary-screen) returned 0 (Win32 error 5)",
  "pid": 16948
}