Bug in the oasis dlc two easy pieces mission

after killing sandman the misssion requires you to pick up the compass piece, however when i open the chest it doesnt give me the prompt to collect the things. ive tried reloading but the same thing happened again. I cannot progress on the quest until I get these items so what can I do? ive attached a picture of the opened chest with no prompt.

edit: also the mission marker seems to be greyed out