There were technical errors happened to XMind server around 2 am HongKong time (GMT+8), Aug. 26th. We knew this error at 8:30 am, and fixed it around 9:20 am, Aug. 26th.

Now, and both works well.

Very sorry for people who failed visited these website during this time. BTW, thanks @MrArne very much, who is the first one reported this error. Thank you again!