Resource not found.

Example:

{
    "type": "resource.not.found",
    "title": "Resource not found",
    "instance": "1dcdb168-8837-415e-92bc-31aa36326495",
    "status": 404,
    "requestField": "propertyName",
    "requestValues": [
        "atc_user1_config"
    ]
}