I have no idea how to make progress in a single puzzle so far. 😂

I am very angry at the game, it does not allow me to get 100% of achievements simply because the code from the safe does not work. I have already passed the game, I can go through it again without hints, but the code that opens the safe simply does not open it, no matter how many times I try to enter it. I watched the walkthrough, checked with it, and yes, the code is correct. But it doesn't work. I was restarting the game. Deleted and installed again. It doesn't help. All I have to do is use the hint, ...

Hi. After start the key is used and gone. In the walktrough is a key for all doors. I cannot opem them. Why?