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I can't open the chest which needs a chest key.
I got the key from the Fallen Defender earlier. When I click the chest, the key disappears,but the chest is closed.
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One general tip is to make sure that the character who possesses the key is selected when you are trying to unlock the chest.
I select the character.
I install grayface patch. This bug is fixed.Then I can open the chest and get crystal skull.