Same here for me and 2 of my Guildmates. As we are quite a few reporting it, and since it in our case only happens after your updates or patches (read: today after the update again), it can not only be on our end. Especially as none of us three experiences the issue at any other given time. So pointing it to our routers or connection – then does feel a bit of passing the buck back to us.
A suggestion, just for trying coming with something positive:
Reading all the posts above, in meanwhile it must be a known issue to you guys. So when you update or patch next time, perhaps a good visible note with a link could be helpful. Exemple “Having trouble with this XXX error code after update? Go to this link- follow those steps”. (Clean install, or what ever else you might suggest there).
Cheers /Elbi