Required Operation outcome

In this example, operation outcome resource is having an required element missing error during the validation operation.

{
"resourceType": "OperationOutcome",
"id": "ff9c8f18-1025-4457-8237-b553011b71f7",
"issue": [
{
"severity": "error",
"code": "required",
"diagnostics": "<A required element is missing>"
}
]
}