psatkha, this is from the website, from 2013 - meaning it's already after the last updates. And I only noticed these errors the other day; I re-downloaded it - it's the same. I wanted to write to you on ICQ, but I need to remember the password, I just don't have the time :D
I decided to restore Menad and the Tormentor, just put them in a separate file; they work normally in the game, but RTMG complains about a non-existent entry when trying to import creatures (if you need the exact error, I can send a screenshot later, but if you're going to fix this, it's easier for you to download RTMG yourself).
But if you copy the Adamantine Golem, the game sees some differences in the checksum when playing over a local network. I didn't really investigate what this is related to; I looked at the xdb in GameMechanics - I didn't notice anything there (I thought maybe there was an extra tag and the game was glitching).
The game complains about this file - GameMechanics\Creature\Creatures\Neutrals\Creature_441.xdb?!

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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1