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I think the problem lies in the poorly designed arena for the battle: the game launches it, encounters a critical error, and shuts down. I recommend trying to launch the battle on this arena separately and see if there are any crashes.
Added 3 hours 25 minutes ago
Hello everyone! I wrote a battle script, tested it, and everything works. But - the AddCreatures function simply adds creatures without any effect, and I would like to add some kind of visual effect for aesthetics. (Important! The SummonCreature function is NOT suitable!)