You should interact with the golden chest in the map with the large lake (it has an arrow on it) but it is currently unreachable due to a bug. Maximum 24 hours and I update the current version to solve the bug.
So... update your version (21%) and reach the golden chest. You need to use Ajoora as a boat. Once you unlock lv4 affinity (in the game you will still see the lv 2 icon but the system is set to consider lv4) go back to the grates and interact.
