Need help with a map.

Hello, I started creating a scenario, completed about 60% of the work, and suddenly encountered a problem: in the editor, the map displays perfectly, but when I try to play it, a loading screen appears, and then, at the "press any key" stage, the map crashes. The error messages that appear when I click "check map" in the editor also appeared before when the map was launched in the game itself, but there are no new error messages. Although I have an older, working version of the map, a considerable amount of work has been done since then, and, moreover, I would like to find out the cause of the problem. Therefore, if there are experienced mapmakers on the forum who are willing to spend some time on the map, I can send it in a private message so that you can give me your opinion on what the problem is. Thank you in advance. :)
P.S. The map was created in the editor of the original Heroes game, and its current size is 541KB.