Uh... well, a random player and a random Castle belonging to Player 1, and the same for Player 2.
Added after 1 hour 39 minutes
In short, forget these maps. It's a real mess here. For the experiment, I set absolutely everything that could interfere with or is required for the map. I didn't take random heroes or random Castles anymore. I did everything as instructed. There's Rumour, there's specialization, I even added armies to the heroes. Each hero corresponds to their own Castle. Everything is perfect, everything is correct; even the check says there are no errors. I load the game, go into network games to look at the maps – mine isn't there. In general, it all went down the drain; I just wasted time and nerves.
There is a guide on creating basic maps; everything is explained and shown. /topic/13059/