Game Assets

I can't finish a very long game... The game freezes when the enemy hero decides where to go... I've replayed previous turns several times - nothing helps.
I've tried all versions, patches, releases, and mods. And they all reproduce the bug.
If I had the source code, I would find the bug. Even if it took me a month.

kinORnirvana, let's look at this from the right angle. I'll try to break down the problem into points.
But first, it should be said that a similar problem has occurred (fortunately, not with me) with different players and on different maps, which I read about in various "Heroes" resources on the Internet.
Personally, on one map (Forest Revenge), I occasionally experienced a "crash" of SoD during the enemy's turn. Loading the AUTOSAVE in WoG, completing the turn in it, and saving the beginning of the next day helped; this save loaded normally into SoD, and I continued the game... until the next crash. And I did reach victory!
So,
1. Game bugs should be fixed by its developers, and in a timely manner. This probably happened many years ago when NWC was still "alive".
2. No one has yet undertaken such a great task as identifying the cause of any bug in "Heroes" and, moreover, fixing it (exception: HD mod by baratorch, however, he probably "simply" rewrote some procedures, without identifying the errors themselves).
3. If a map "glitches" and it is not possible to pass it beyond a certain day/place, the most reasonable thing is not to go crazy, but to abandon it (even with great regret): there are still hundreds of interesting maps that can be completed and where there are no bugs!
However, if anyone can help by "tinkering" with the save - why not? By the way, be sure to tell us what comes of it!
Yes, and what map is it? Can you give a link or post it here?