I have done some experimentation and if I shut down my whole computer and then boot it up immediately and go to construct it lets me preview it for a brief time. I will say I'm not sure it matters what browser is being used since from what I've seen in the other thread the other person is using google chrome while I use brave. I've also tested if its my VPN and that does not seem to be the case either. I tried another browser where the viewer works but its extremely slow and I really wasn't on it that long. I also am only using the automatically updated version construct automatically gives out.