How to resolve Default parser issue? - rest-assured

Question

Hi i am getting the following error when trying to run a post req. Are there any dependencies that are missing ?
Exception in thread "main" java.lang.IllegalStateException: Cannot invoke the path method because no content-type was present in the response and no default parser has been set.
You can specify a default parser using e.g.:
RestAssured.defaultParser = Parser.JSON;
String a= "80820221";
String body= "{\n" +
" \"request\": {\n" +
" \"id\": \"" + a + "\",\n" +
" \"id2\": \"800002400434\",\n" +
" \"id3\": \"\",\n" +
" \"id4\": \"WEB\"\n" +
" }\n" +
"}";
RequestSpecBuilder reqBuilder = new RequestSpecBuilder();
// Setting Base URI
reqBuilder.setBaseUri(base);
// Setting Base Path
reqBuilder.setBasePath(basePath");
reqBuilder.setContentType(ContentType.JSON);
// Getting RequestSpecification reference using builder() method
RequestSpecification reqSpec = reqBuilder.build();
Response response = RestAssured.given(reqSpec).body(body).log().all().when().post().then().log().all().extract().response();
int status = response.getStatusCode();
System.out.println(status);
**String successMessage = response.getBody().path("response.status")**;
System.out.println(successMessage);
it is giving errror in the above line
i am expecting 200 response. In postman it is giving 200 but in script it is returning 400 and unable to get the response body