We announce that the disconnected server issue was on 20th March 2019, PDT
In addition, we are performing urgent maintenance on Wednesday, March PDT.
We apologize for the server issue and urgent maintenance.
Server unstable time:
17:40-01:00 (UTC March 20 -21, 2019)
10:40-18:00 (PDT March 20, 2019)
Again, we are so sorry about this problem.
We try to provide better service for our users.
Thank you for understanding.