code:

    try {
	var xhr;
    if (typeof XMLHttpRequest !== 'undefined')
		xhr = new XMLHttpRequest();
    else {
        var versions = ["MSXML2.XmlHttp.5.0",
                        "MSXML2.XmlHttp.4.0",
                        "MSXML2.XmlHttp.3.0",
                        "MSXML2.XmlHttp.2.0",
                        "Microsoft.XmlHttp"]

         for(var i = 0, len = versions.length; i < len; i++) {
            try {
                xhr = new ActiveXObject(versions[i]);
                break;
            }
            catch(e){}
         } // end for
    }

and how to solve it?

game made and exported in GDevelop

i see no problem in this at all

im using a HTTPS web to comunicate with the app/HTML5