I started a new game. My system is Ubuntu 20.04 and I'm running the game with steam proton 6.21*. When siege starts, troops start to spawn, after several seconds game just quits. I ran it with proton_log=1 and found a log file in the game folder with message "err: DxvkMemoryAllocator: Mapping memory failed with VK_ERROR_MEMORY_MAP_FAILED". I'm not sure how to solve this error but it seems that this is the culprit. Please, give me an advice on what logs to look into or what I should do.