You can try getting your save files and re-installing the game
(Save files are located in the game's folder, something like ...\Itch_Games\cabin-by-the-lake\CabinByTheLake-0.61d-pc\game\saves). If you take those out you can do a full reinstall of the game with no worries about loosing your progress (just remember to put them back when you're done).
Sorry for the late answer.
Unfortunately none of those solutions worked, I even had to reset my PC recently and it didn't change anything, I still have this exact error msg.
I don't have my save anymore and I don't mind but I'd really like to be able to play this game again.
Do you have another idea of what can be done?