I wanted to play the mod with my friend. He has windows 10 and couldn't use the mod unpack-er. So I took the unpacked folders in his Napoleon folder (update 7.1b inclusive) The mods runs on his system. I hosted a game but he could not join saying "could not join the game". I started with the Napoleonic TW3 MP button (left), as he did as well.
What can I do ?