Are you able to trigger any of the statues or none at all?
And i noticed the Lemprasa pond requires a zemyna statue, not a vakarine. So the guy in the linked thread seems to be standing in the wrong spot for that one. (Assuming it isn’t a mis-translation.)
If you’re on Klapeida i can bring a dievdirby and see if the wooden statues can trigger the quest instead, but i wouldn’t get my hopes up for that.