I had the problem Monday night and one day last week. It seemed to be only Crick (tried other US servers and EU servers; they were fine) and with both my accounts there. (During Monday's episode, I did also experience the same symptoms once while trying to get into Landroval).
What happens is, after clicking "Enter Middle Earth", the load screen appears and the eye of Sauron continues its animation, but the progress bar never moves. On Monday, one of my accounts was logged in, but experienced that same stuck load screen after grabbing a stable horse. I rebooted, but it was stuck on entry just like the other account. Thus, I think it has something to do with loading the landscape frames. . .either the server is not sending the information or is garbling it.