Crash at the hydraulic door

[Grafit]

Hi,

I Played the game for several days without any problem (game bought through STEAM) and I just arrived at the Hydraulic door just before the end of the game.
I open it with the crowbar and have the loading screen for the next level ("as I stepped into the mouth..."), but then the game crash and I have the 'BlackBox' saying:
Penumbra caused an exception_access_violation in module penumbra.exe at 001B:0058C050

and

stack trace
001B:0058C050 penumbra.exe
001B:00592DEB penumbra.exe

I can't finish the game. Can anyone help me, please ? Thanks.