Constant crashes on Linux, especially when starting battles

Hi.

I’m using VCMI 1.6.5 (yes, I know it’s not the latest version - but I can’t find a way to install 1.6.8 on Debian), and I’m having LOTS of crashes during games. Most of them happen when I click to fight a creature stack on the map, although not all crashes happen under this condition and not every battle causes a crash. It happens more often the further into the game I am (I can’t even seem to reach month 4).
I tried different game modes, and it happened in WoG, regular H3 and some “random” mix of VCMI mods that I picked.

Any ideas on how to avoid it, given I literally can’t update?

Hi
Can you upload log file immediately after the crash?
To find log files, open Launcher - Help - Log files directory.
Log file is named VCMI_Client_log.txt

I’m getting a message saying new users can’t upload files - so I uploaded it to my personal cloud.
Here’s the link:
https://filedn.com/liLoCPOliuupsnGrEk6LLc0/VCMI_Client_log.txt