Lighting bug. (Far Cry 6)

I won’t hide it, I play (I’ve been trying to play for the third day already) on a pirate.

I ran into the problem of either a lighting bug, or artifacts from the video card, I don’t understand myself, but I didn’t manage to solve this problem.

If you try to describe in your own words, then all the textures in the game that have lighting begin to "swim" with some kind of huge, black pixels, until the screen is completely black.

Computer configuration: Intel Core I5, Intel Iris XE Graphics, 12 GB RAM, 512 GB ssd.

on the minimum settings, the fps reached 50. On Ultras, up to 20-25. So I rule out the possibility that this vidyuha can not cope, because in addition all the other textures in the game that do not have lighting feel quite fine.
I hope for your help.