Json IE1011 Ajax XHR 错误 SCRIPT7002：XMLHttpRequest：网络错误 0x2ef3

I've been working on this problem for a few days and reaching out on this forum since I feel like I've exhausted my options. I have a form hosted on a Drupal 7 website and need to submit the form values to an external url. The form uses a POST request over the HTTPS protocol via jQuery.AJAX

• Form works fine in Chrome, Firefox, and Safari
• 我在IE10+控制台中收到以下错误(使用IE10+时，Ajax调用总是进入错误函数):

SCRIPT7002: XMLHttpRequest: Network Error 0x2ef3, Could not complete the operation due to error 00002ef3

I've tried the following:

• 正在添加ContentType:

  // causes all of the jQuery callbacks to error out
  "application/json; charset=utf-8",
  

• attempting an Ajax GET call before the actual POST (as suggested on another SO thread)

• 将header( 'Content-Type: application/json; charset=utf-8' );添加到请求中

• 设定crossDomain: true

已添加相应的CORS标题，表格代码粘贴如下:

$.ajax({
    url: "[URL]", //the page to receive the form data  
    crossDomain: true,
    type: "POST",
    data: dataString, //posting to API 
    dataType: "json", //the data type the function should expect back from the server     
    success: function(data) {         
        if (data.response_status == "1") { //error for at least 1 field
             //display error message 
             }
             else { 
             //display thank you label next to input
             }

        } else {
           //All form fields completed successfully! Redirect user to Thank you confirmation page            
        } 
     },
    error: function(jqXHR, textStatus, errorThrown) {
             alert("there is an error!");
             console.log("in error section");
             console.log("jqXHR: " + jqXHR);
             console.log("jqXHR.responseText: " + jqXHR.responseText);
             console.log("textStatus: " + textStatus);
             console.log("errorThrown: " + errorThrown);
             data = $.parseJSON(jqXHR.responseText);
             console.log("parseJSON data: " + data);                           
    }        
    });         
  });
});

I've read SCRIPT7002: XMLHttpRequest: Network Error 0x2ef3, Could not complete the operation due to error 00002ef3

Any guidance would be helpful! THANKS