Same error, I got disconnected at a little before 23:00 GMT+2 while I was trying to do the Marauder level 5 class quest.
When I try to relog I keep getting this error:

The connection with the server was lost
Error: 10102

Name: Toshiko Nakata
Server: Odin

Additional info:
Logged in at 23:13 GMT+2 and got 90000 Error this time.