The "Gone Missing" quest, located in Bergama in the Alik'r Desert, is broken; it doesn't work and is impossible to complete because a door leading to the "A'tro's Oasis" building cannot be opened. The game doesn't recognize that you're wearing the outfit, and even though the NPC "Crown Keeper Seral" welcomes you and grants you access, this simply doesn't happen because the door is interactive and displays the message "The item is not available at this time." I would like a solution to this bug, as it's a core area error in the game and makes it impossible to finish the story.
I've already restarted the mission 6 times, and restarted the game 4 times, and seeing other posts, I can be sure that the mission is broken.