Mystery Box Bug - Another Game Bug

Is it just me? or anyone of you experiencing the same problem that I have? whenever I click the mystery box it only transfer me to a blank screen. I tried refreshing it from time to time but nothing really happens. I'm expecting to get items stated here. If anyone of you got an item from Mystery box, maybe I'm not just part of the beta testing, but if all of you have the same problem as I do, it's clearly a game bug. So sad. It seems like every game updates they made always has a problem.