HttpClient-没有mediatypeformatter可用于读取“Model”类型的对象

I am using httpclient with .net core 2.1. Now the issue is when I am trying to fetch data from url I am getting the error "No mediatypeformatter is available to read an object of type 'Model'". The code is working fine on other places but here I am getting an exception. Here is the code:I am using httpclient with .net core 2.1. Now t