Just had this one for the first time. Is it a new way of bothering us? Error 90000 is happening in 50% of my dungeons, then there is the usual error that you are still online and when you can finally log in ... hello ERROR 10102!!! And then you're kicked off the instance and you just lost 1 hour AGAIN. And of course you CANNOT tag for a new instance because the game considers you left the group so you have 15 mins lock out.
Keep up the good crap SE, my patience is almost dead!