Exception Operation outcome

In this example, operation outcome resource is having an exception error during the validation operation.

{
    "resourceType": "OperationOutcome",
    "id": "1d044804-2d21-4512-b284-0bbe82e71d00",
    "issue":  [
        {
            "severity": "error",
            "code": "exception",
            "diagnostics": "<An unexpected internal error has occurred>"
        }
    ]
}