Map description: "The map is a pure mod! A clean version of the game is recommended!"
You are trying to install a mod on a huge global mod. Of course, they will conflict. A lot needs to be done to make my maps work on EWA.
"Heart of Night" is not a mod in the broad sense: z
The first comments can be safely deleted: at release, the map crashed on low graphics settings, and this was fixed a long time ago.
Added 4 minutes ago
Why do I think it's "Heart of Night" and not "Heart of Darkness"? Well, because Google didn't find a map with that name, and I know "Heart of Night" very well) Except for the "Heart of Darkness" campaign from the original Heroes 5 for Arantir and Ornella.