System.InvalidOperationException: "Incorrect Content-Type". With all possible combinations. Why?

Question

ASP.NET

Everything works on one computer. Transferred to another and the studio writes in the place where I accept POST parameters - System.InvalidOperationException: "Incorrect Content-Type
I changed all kinds of Content-Type in jquery, it still writes Incorrect Content-Type and the specified type. understood, what works on one computer, and swears on another.What
could be the matter?

Answer 1

In jquery ajax request added

$.ajax({
    url: '/api/param1',
    headers: {
                    "Content-Type": "application/x-www-form-urlencoded"
    }....

and began to work.