Flying Blind Mission Glitches

Xbox OneX
Steps To Reproduce:
Everything, reset Xbox, rest game.
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Working towards completing “Flying Blind” mission did everything to unlock the door to the weapon storage. I was unsure of what to do next once I entered because nothing indicating what I should do next. While I was looking around My friend noticed three big weapon storage containers that he looted and after that I then noticed the last part of the mission where I pick up a piece of paper and a key which evidently unlocks those three big storage container. Because we looted them first the mission has glitched and is not completing.

Please help!