I can’t get the key from the key keeper. Auto-translated

I have a licensed version of the game. I played without patches, and everything was fine. I installed patches 1.4, 1.5, and 1.6. After that, I can't get the key in the guardian's tent. The hero approaches the tent, and nothing happens; only the number of turns decreases. And so on until the end of the day, and then the next day, and so on. What's the problem? How do I get the key? It doesn't matter if it's a single-player scenario or a campaign.