Your code does not match the documentation. The target option does not take an array reference but a hash reference.

Instead of

    target => [{
        size => { width => 65, height => 12 }, #=> $elem->get_size,
        location  =>  { x => 35, y => 5 },  #=> $elem->get_element_loc
+ation_in_view
    }]
[download]

pass a hash reference:

    target => {
        size => { width => 65, height => 12 }, #=> $elem->get_size,
        location  =>  { x => 35, y => 5 },  #=> $elem->get_element_loc
+ation_in_view
    }
[download]