Update: we have identified the issue and the server should be back online shortly.
Accounts who generated currency due to this bug will be investigated and the additional currency will be removed from the game economy.
The game is currently down for an emergency maintenance. During the maintenance, we will address a potential exploit with the Gold Market. We expect the servers to be back online in 30-60 minutes and we will keep you updated in this thread.
We apologize for the inconvenience and thank you for bearing with us!