How can i open Ancient Guo-Lai Cache?

[jjang2619]

hi~

first of all, i sorry bad english.

How can i open Ancient Guo-Lai Cache?

when MOP, i'v used objectgatherer.

but now it's not work. so how can i open the Ancient Guo-Lai Cache?

it's has 3-4 treasure. So it's need to time delay after open Ancient Guo-Lai Cache.

please help me.