When a key within the json object has hyphen, possibly it is causing an issue with Karate. Here is an example –

{
  "id": "1234",
  "type": "FICTION",
  "attribute": {
    "bookPrice": "10",
    "authorName": {
      "firstName": "Dean",
      "lastName": "Jones"
    },
    "links": {
      "get-book-by-id": {
        "href": "/v1/books/1234",
        "title": "get-book-by-id"
      }
    }
  }
}

In this example, the key “get-book-by-id” is seperated by hyphen and when I try to travers to this element, I am getting an error something like below –

org.graalvm.polyglot.PolyglotException: ReferenceError: 'book' is not defined.