Internet Explorer - script5 : Access Denied

Hi,

I have develop an application for internal use for the company I work for.
This web app gets the GPS location of my units and puts them on google maps.
I use the Javascript API for the code.

When I open this web app with Internet Explorer 11 some units won’t show anything on the map, even if there are GPS coordinates.
When I open the Developer Tools for debugging, I get the message SCRIPT5:Access Denied which points to the address : https://hst-api.wialon.com/wialon/post.html

That messages appears at page load.
At page load I do a login connection to Wialon.

function wialon_login(){
    wialon.core.Session.getInstance().initSession("https://hst-api.wialon.com"); // init session
    wialon.core.Session.getInstance().login("username", "pass", "", // try to login
    function (code) { // login callback
           // if error code - print error message
        if (code){ console.log(wialon.core.Errors.getErrorText(code)); return; }
    console.log("Logged successfully");           
      });
}
Can someone point me to a solution why I can’t get it to work with internet Explorer 11.

Everything work fine with Firefox & Google Chrome.

Thanks!