Someone please relay this message to the nice folks in charge of updates:
Please try to not update the game, run maintenance, or other shenanigans during the last hour of the maze. Many players are trying to use their coins during this discounted time. You have done it several times now and it has been a very unpleasant experience, to the point that I feel something needs to be said.
Also, have you guys ever considered doing announced server maintenance/update so is more systematic for everyone? As a player, it sucks to be winning in a war battle or PVP, only to be greeted with a message "Surprise!! Something went wrong, please restart the game" or just plain crashing due to unannounced game updates or maintenance.