The quest is working as it should, the location is also correct. From what I have seen, this should trigger a mission.
Since today is a holiday in many countries we are encountering issues with all mission rooms being occupted, since so many players are online.
There is a limited amount of mission rooms the server can have and if they are all occupied by players, other players can't start missions anymore.
This also happens to quest missions (which start when you trigger them by walking over certain coordinates).
Please wait a few minutes and try again after changing the map once and running to the coordinates again.
Each time a mission is finished, one mission room will be free again for the next player.
We will add more mission rooms in total with next maintenance. If you need further information or faster answers, I gladly invite you to join our Discord.