A lot of us on order have (For the past hour now) had problems staying connected to Istaria. I'm not sure if it's something server side or not, but none of us are using the same ISP and we are in totally different countries. (I'm from Germany for example while another is from the USA)
Not sure what the cause of the problem is but we all seem to log out at the exact same time, and all with the same error.
Note: This is the first time I have encountered this particular problem x.x