I've tried to open a HERC-07-28 supply box, and received an error message while the box was peeping waiting to be opened:
"You cannot open a supply box at this time". I've just opened a war reward box a minute or so earlier.
On top of this, I lost my lvl 03 key and the supply box as well.
My DZ ID is: kong5295963
I'd like to get at least the key back.
Thanks for the support,