It seems there is a gamesave issue with GOG version, it happens like this:
1. I tried to get access into sewer to change to another place, the game shows "save failed".
2. I made quicksave, then I load the game, it reads "no profile found".

In steam forum people talked about load/save issue, they say the latest patch solves this problem. Also they suggest stop "cloud save" function. I tried this but no use.

Anyone can tell me how to solve the problem? Or the game just can't go on.

Thanks.