I wanted to offer some advice. To play on a map with all factions (meaning that when playing as Elves, the Elven music plays, quests are displayed, and all heroes develop), you need to check the box only for "Single Player" in the "Global" section of the editor and select the race you want to play as. (It's better not to enable multiplayer if you're playing alone). If you want to allow players to play as 3 different races in single-player mode, it's better to create separate maps for each.
I wanted to offer some advice. To play on a map with all factions (meaning that when playing as Elves, the Elven music plays, quests are displayed, and all heroes develop), you need to check the box only for "Single Player" in the "Global" section of the editor and select the race you want to play as. (It's better not to enable multiplayer if you're playing alone). If you want to allow players to play as 3 different races in single-player mode, it's better to create separate maps for each.