I completed the exotic quest for divinity up until the last step and then did the raid, completed all of the secret objectives for the quest, beat the raid and at the end I wasn’t able to open the chest. Hopefully someone at bungee can help me out because I don’t know what to do. Thanks
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Sadly, it sounds like you will have to entirely redo the puzzles. Bungie can't make guns magically appear for you. It doesn't matter why the chest didn't open since you left the raid and didn't get the gun. Good luck on doing the divinity puzzles a second time.