Well, I know plenty about my setup, using 3 different computers to access the site, all with the same issue. I am using satellite internet, not using a firewall other than the one integrated into my netgear router. I have almost always used Firefox to access the site, although Google Chrome has also been used.
As for the error, it looks like it might be related to the sites bandwidth, because I can occasionally smaller files like .esp's, but data files, and compressed files, seem to always trigger the errors. I have been involved in web design and programming for almost 20 years now, and I can reasonably assess that the issue is on the sites end. It is possible that my ISP could have put restrictions that I am not aware of, but that seems highly unlikely, that they might specifically target LL, and nothing else.
If there was some specific info you need, I can certainly provide that info.