Ubuntu Jitsi + Etherpad Server Configuration

I having troubles getting my Etherpad running on Jitsi. Etherpad is configured, however, when I try to share documents, another picture in picture Jitsi session opens (within the same Jitsi session) with a video instead of the Etherpad "whiteboard". The views are screenshooted as following: 1) Screenshot1: Jitsi Service is up and running - all features (excl. Etherpad) like Video, Sound are working perfectly. 2) Screenshot2: Etherpad integration is done, which you can see under "Share document" 3) Screenshot3: View when I click on "share document" which is the picture in picture video. 4) Screenshot4: Showing the inspect element errors I am using Ubuntu, nginx as for the server and proxy. So what I want you to do is to fix the "accessing a cross-origin frame" issue (Screenhot4), so that Etherpad can be called properly. I found this thread, maybe it will help you: [login to view URL] Please also describe in simple what the steps will be performed from your site, so that I know that we are on the same page. Many thanks.