When the item is locked and put in storage,after maintenance on June 28 ,we can't unlock or use it. I already tried to restart the game but nothing happend. I tried to put it to my characters inventory to inlock it but still nothing happens. Please fix this PA or it's a waste of 1 day + hottime

You should contact their Customer Support for them to be able to assist you. An announcement in discord was posted indicating the need to do so in order for fix the problem with having those chests locked.

The sooner you will be able to contact them, the sooner you will be able to use them. Good Luck!