I'm trying to play The Dark Descent on Xubuntu 20.04 and getting the following error:

Running Amnesia: The Dark Descent
support/gog_com.shlib: line 94: 116646 Segmentation fault (core dumped) ./"${bin_64}"

What is a segmentation fault? How can it be fixed?

I'm also getting a segmentation fault on linux when continuing a saved game.

Hello I have the same issue and I have installed the game with Lutris. Here is the logging file:

Start monitoring process.
gamemodeauto:
gamemodeauto:
gamemodeauto:
gamemodeauto:
Running Amnesia: The Dark Descent
support/gog_com.shlib : ligne 94 : 43293 Erreur de segmentation (core dumped) ./"${bin_64}"
Monitored process exited.
Initial process has exited (return code: 35584)
All processes have quit
Exit with return code 35584