Unable to Proceed Quest - In Entropy's Grasp

I'm stuck on the "In Entropy's Grasp" quest due to a game-breaking bug, which, not even the first bug I've encountered. This game is so full of bugs it can be called The Bug's Life. And I'm only a couple of hours into the game.

For the information, I'm playing in a gaming laptop using windows 11, and I got the game from Steam.

The problem starts at the stairway to the ballista area (attachment 1). Any save I make after this point won't load properly. When I do try to load, my character shows up headless, and if I press any button that opens any menu (journal, save, etc), the game freezes (attachment 3).

When I try to just proceed with the game anyway, Bellara's usual prompt for the ancient device didn't pop up either, and the construct didn't move when I approached them (attachment 2).

I've checked in this forums but haven’t found any problem similar to mine. Has anyone else run into this? Is there a way to fix it, or do I just have to wait for a patch?

I’ve already tried loading an earlier save, restarting the game, and rebooting the laptop, but nothing works.