Web api gives no result

1 URL WIKIPEDIA https://www.botlibre.com/rest/api/form-chat?instance=10683342&message=hoe+gaat+het&application=xxx

Issueing this request has no result while via the api console the request shows the correct response

var request = new XMLHttpRequest();
request.open('POST', 'https://www.botlibre.biz/rest/api/chat', true);
request.setRequestHeader('Content-Type', 'application/xml');
var xml = "<chat application='xxx' instance='10683342'><message>hoe gaat het</message></chat>";
request.onreadystatechange = function() {
 exampleResult.setValue(request.responseText, -1);
};
request.send(xml);

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><response conversation="1773657403966351985" emote="NONE" avatar="images/bot.png" avatarType="image/jpeg">
<message>het gaat goed in ben in opleiding</message></response>

Please advice