First, we invite you to check if the automatic backup is not involved, it is necessary to progress in the steps of the story to save game progress, if you can't load your game by Continue or Load after you solve some puzzles, we invite you to try to launch the game in administrator mode, see below, and also to consult the Savegames FAQ.

Administrator Mode :
Open Steam and go to Library, right click on the game and go to Properties then in Local Files and finally open the game folder to access Syberia3 (.exe), right click and go to Properties
Go to Compatibility and check "Run as Administrator", validate.
Start your game normally.