Did you only copy the "saves" file from the last version within the "www" folder?
Viewing post in Daily Lives of My Countryside comments
There's your problem. You overwrote some of the core files. Unless you mean you were updating and it no longer works...? Because if you were updating, copying the saves to a new folder as backup would be a good idea, followed by copying the new files *after* deleting the game files themselves, keeping the saves folder intact.