I'm working with Michael on this topic and I'd like to add more information with our findings so far. We managed to get the link "Read more" to display something.

In the implementation of our Chatbot, when clicking on "Read more" the Javascript function "showkmarticle" runs. This is the original code:

function showkmarticle(articleId) {
  var domain = PegaChatConfig.PegaServerURL.substring(0,PegaChatConfig.PegaServerURL.indexOf("/PRChat"))
  alert("You are attempting to open an article with id " + articleId + ". In order to display this article, update the function 'showkmarticle' to invoke a URL of type " + domain + "/PRServletCustom/help/article/" + articleId + "/{{articletitle}}");
}

After clicking, the alert message is shown:

Therefore, we have updated the Javascript function "showkmarticle" as indicated. Invoking a URL with the Article ID:

domain + "/PRServletCustom/help/article/" + articleId + "/{{articletitle}}

This is the first attempt. The article title is hardcoded, although changing this value doesn't seem to make a big difference, so any value might be valid there.

function showkmarticle(articleId) {
  var domain = PegaChatConfig.PegaServerURL.substring(0,PegaChatConfig.PegaServerURL.indexOf("/PRChat"));
  var url = domain + "/PRServletCustom/help/article/" + articleId + "/Warranty%20Claim/";
          
  var urlObject = {
    url: url
  };

  pega.api.ui.actions.openURLInWindow(urlObject);
}

A new window is opened with an error:

There are also errors in the logs and JS console:

com.pega.pegarules.pub.PRRuntimeException: No failure response set by custom authentication activity