To try and remedy this please can you try abandoning the main mission. You will be able to reacquire this and it should not effect your progress in completing the mission as the items will be returned to you when you reacquire it.
Please do this for me and if you are missing any items/progress please submit an In-Game ticket. We will then look into the issue further.
Thanks for your patience.
I just got lost as in a previous quest of the series stepping on the green dot was the quest trigger, in this one you actually have to click it, I just discovered this at the 5th reset :>