Exception at tick 15080235: Error while running event Achiever::on_player_setup_blueprint (ID 68)
An area of zero size is not supported. Either don't define area to search the entire surface or use 'position'.
stack traceback:
Achiever/control.lua:54: in function <Achiever/control.lua:50>

Replication steps: Use a blueprint to select a point area, by not moving the mouse :)

Changing the code in control.lua like this solves the problem (feel free to incorporate the fix if you like)
-- control.lua ~ line 50
function isZeroSizeArea(area)
if (area.left_top.x == area.right_bottom.x) and (area.left_top.y == area.right_bottom.y) then
return true
else
return false
end
end

function onBlueprint(e)
local player = game.players[e.player_index]
if not player then return end
player.unlock_achievement("blueprinted")
if not isZeroSizeArea(e.area) and player.surface.count_entities_filtered{type = "splitter", area = e.area} >= 10 then
player.unlock_achievement("well-balanced")
end
end

Thanks, this will be fixed for 0.2.1