I couldn't do the Inquisitor. I saw the green circle for half a second. I must be doing something wrong, or not right.
I had that issue at first, then i noticed that you need to click and hold the mouse on the green dot and slide left and right to frame the weapons, which just involves slowly moving the mouse till you see a giant flame on the screen and a picture of the weapon. Do that all three times and you get the weapon pack.