Viking Saga Chap 1 Level 10

Help!! I cannot for the life of me get to the 10th statue peice. In the videos it appears simple. I know where its at, I just cannot get it. I have aculated over 100 wood, food and silver and have 4 workers. Why can't I get past the rock?

i'm having a similar problem, except i don't know where the 10th piece is. there's only one free-standing rock left on the screen (that must be it, right?), and it's not clickable. is this a bug?