Handle error in async void DispatchRequest

[RemiDrouot]

Hi,

I found some issues when request.downloadHandler.text retrieve an error message.

Because the lines retrieved are like that

and after you try to convert them with: var data = JsonConvert.DeserializeObject(value, jsonSerializerSettings);
But this give a error exception because the json format is not correct.

I have done some changes to fix this
https://codefile.io/f/HWLrBZPdhh

Tell me if it's look good for you my fixes.