How to use Bitly V4 URL Shorten API on IE11

I am trying to use the Bitly V4 URL Shorten API on IE11 via ajax POST, but getting security error after the preflight (OPTIONS) call. My implementation and error encountered as below:

My code:

$.ajax({
    type: 'POST',
    url: 'https://api-ssl.bitly.com/v4/shorten',
    data: JSON.stringify({group_guid: '<Bitly_group_guid>', long_url: 'https://www.google.com'}),
    dataType: 'json',
    contentType: 'application/json',
    headers: {
        'Authorization': 'Bearer <Bitly_generic_access_token>',
    },
}).done(function (resp) {
    console.log('OK');
}).fail(function (jqXHR, textStatus, errorThrown) {
    console.log('NOT OK');
});

Error in IE11 console (thrown after the preflight):

SEC7123: Request header content-type was not present in the Access-Control-Allow-Headers list.

SCRIPT7002: XMLHttpRequest: Network Error 0x80070005, Access is denied.

Preflight (OPTIONS) Response Header - response code 200:

access-control-allow-headers: *

access-control-allow-methods: HEAD, GET, POST, PUT, PATCH, DELETE

access-control-allow-origin: *

allow: POST, OPTIONS

alt-svc: clear

content-length: 0

content-security-policy: default-src 'none

date: Thu, 28 Nov 2019 03:13:04 GMT

server: nginx

strict-transport-security: max-age=31536000; includeSubDomains

via: 1.1 google

x-content-type-options: nosniff

x-frame-options: DENY

x-xss-protection: 1; mode=blockFilter

In the end the POST method doesn't execute at all, the same code however WORKING on Chrome and Mozilla, which the POST method get executed and managed to shorten the URL.

• I have a read on Bitly CORS, but it doesn't seems to support V4 from my understanding.
• I can't opt to make change to Internet settings on local machine as the same need to be done by every end user.

Appreciate if anyone can share insights to overcome this.

After checking the documentation I found this information about browser support for Bitly api.

The Bitly web app supports the latest versions of Chrome, Firefox, Edge, and Safari. We recommend using one of these browsers for full functionality of the web app.

Other browsers are not tested and may not function properly with the Bitly web app.

Reference:

Which browsers does the Bitly web app support?