PATCH function not working in JQuery Ajax

[former_member750972]

Hi guys I'm trying to work out the patch function but not working in my server. See below the error.
i don't know the preflight error.

and this is my sample code.

$.ajax({
        url: "https://192.1.3.92:50000/b1s/v1/BusinessPartners('TC001')",
        xhrFields: {
            withCredentials: true
        },data: jData,
        type: "PATCH",
        dataType: "json",

        success: function(json) {
            console.log("Ok");
        },

        error: function(errorThrown) {
            console.log("Error: " + errorThrown);
        }
    });