Diablo 1 HD Hellfire Mod | Awake

Hi! I came from a long time (not too long as it should) playing on Belzb. and now I'm on a new journey on Tchern.

I went to LT and couldn't open box instantly! Tried many times, but i always have to wait before opening the box.
There's exactly something that I should do before opening?

Thanks!!!

5 min cooldown