I did a small mistake.
I was playing let’s build a robot army mission and I moved until the gate before install facility part of the mission.
Then, I saw the purple chest before I have to complete this part of the mission and install the facility.
So, I thought that I might get more benefit of this chest so I can get out the game and come back and open the chest again
So, when I came back the gate is closed and I can’t open it !
What to do now ?