There’s an issue with the resolution.

I tried it – the resolution was set to 1920x1080, I manually changed it to 640x480, and the game crashed. After that, I manually changed 640x480 back to 1920x1080, and I was able to enter the game normally. Then, in the game settings, I set the resolution to 640x480 and exited the game. As a result, the line in user_a2.cfg changed to 640x480. After that, I manually changed it to 1920x1080 and tried to enter the game – I was able to enter normally. So, it seems that if I try to change the resolution manually (through user_a2.cfg), the game will only allow me to change it from 640x480 to 1920x1080, but if I try to change it in the opposite direction, the game crashes.

Added 2 minutes later
During all these manipulations, the image was stretched.