Well, I know nothing about Lua; but I am familiar with other coding languages. Based on what I can figure, the problem appears to be that you do not have DPL enabled on your wiki. To have it enabled, contact staff.
Well, the lines from the error output would suggest that the module does try to use it. Combined with the facts that the OP just copied the module and the source wiki has DPL enabled, I figured that was the most likely issue and that enabling it would most likely be the simplest solution.