The shard store issue has been reported on most EN versions of Dragon Awaken. Since there has been a week-long holiday in China from 1-7 October, any fix will probably occur after that period. So there will hopefully be an attempt to fix the shard store over the next few days.
The game is something of a shambles by now, so this kind of error isn’t that unexpected. I think that shard store has had similar issues in the recent past, though this time the problems lasted for longer.