That is why I left the link behind “non-networked qube”, to show to the ones interested in how any non-networked qube can be set up to be updated via qrexec too, by customizing policies beside other steps needed to be taken to.
You are welcome. I’ve seen this already, but it worked for me. It’s obvious that you are connected to the proxy and that the problem is that the access after it is forbidden, so most probably it’s not about qrexec but with the network. Did you check this topic?