I believe the issue is just with HTTPS. I am not sure how the other post you referenced used an HTTPS link (which came from me), but I have my guess. First of all, the link available to the help from Pega Robotics Studio (or the Plugin) takes you to the HTTP site. My theory on why the other post has an HTTPS link is that I may have navigated to the site manually years back to get that link and in my history was the HTTPS version of the site for whatever reason. Since that is really un-published, I would think that the HTTP version is what should be used and what is in-fact linked to from Studio.