Hope you everyone is well !

I have just started working on Amadeus WS and i am struggling to understand the header 4.0 . I would like to request any helpful data on this please as i am getting “12|Presentation|soap message header incorrect” . If a source that can help me please so that i can rectify my issue.
Thanks

C# code is given below

using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add(“SOAPAction”, “http://webservices.amadeus.com/FMPTBQ_24_XXX”);
var response = await client.PostAsync(“https://nodeD2.test.webservices.amadeus.com/XXXXXX”, content);
response.EnsureSuccessStatusCode();

  var result = await response.Content.ReadAsStringAsync();

  AmadeusResponseError amadeusError = new AmadeusResponseError();
  amadeusError.error = response.StatusCode.ToString();
 
 
  var error = await response.Content.ReadAsStringAsync();
  ErrorResponseAmadeus errorResponse = JsonConvert.DeserializeObject<ErrorResponseAmadeus>(error);

  return Ok(errorResponse);