(Guide) Excavation, Dig Deeper wont complete

I have gone to the marked area, used the sonar, dug up the relic multiple times with 3 different characters and the quest does not complete. I have used the equipment I purchased from Nickle, gotten when accepted the quest and nothing completes the quest.

I was having the same issue, turns out you have to have Sonar on first, and then use Relic Search.


Thank you that worked this time.