Leap Forward-BT (CHI)

Help me if you can! I started playing a REALLY cool map called "Leap Forward-BT". I played for the first week, which took about 7-8 hours. And now, when I finish my turn on the 7th day of the first week, the game freezes when it reaches the brown player; Wistan, in the far north of the overworld, reaches the water, tries to summon a ship, and the game freezes, but doesn't crash. I tried reloading it in other versions of Heroes 3, but the result is the same. Maybe if you load the attached save, simply advance to day 121, and then save the game back to day 121, it will help? Or is the problem more complex? Or what would you advise? It would be terribly long to replay.

Notably, starting around day 2-3, I was fast-forwarding to days 8-9, and there were no crashes. This is the first time this has happened. I haven't modified the game, and everything has been working stably for years! I'm using Windows 10, by the way.

UPDATE. I tried enabling gosolo from the first day. Now, on the 3rd day, the brown player, at the same point in the far north of the overworld, approached the water, presumably tried to cast something, and the game froze on the brown player's turn. Perhaps the problem is with summoning a ship for the event (and the event involves Azure Dragons)... I don't know. Is it possible to load the map and play as the computer (brown player) instead of playing as the red player, and play in the opposite direction? But I just don't have those technical skills. I'll also attach the initial map