Why can't I try the third step of sword net 30 thousand scented tea

The first step is to get things, the second step is to get water from the lake, and the third step is to go back to the place where the first step was taken to make tea (well, to borrow the saying from upstairs). If there are no problems in these three steps, it means that the landlord has given you the tea in the bag after trying to make tea before, and you can continue to make tea after drinking that tea ~