i get to the last chapter and go to make a antipoision potion and it says game has stopped working. it is by legacy.

Reboot the computer and try again.
If that doesn't work, since you are near the end of the game, either complain to Big Fish or check a YouTube video to see the end of the game.

that work, and i started over and finish lovely game.

Some of my Big Fish games crash while auto-saving, but manage to save anyway. So when I reboot and try again I can continue from where I was before the crash.

It would be better if they didn't crash at all, but it isn't a huge problem if rebooting fixes it and I don't have to replay anything.

it was a legacy game and it work when i reboot, but lost some of my herbs, i delete my name and started over.