patch problem

[Elaqwqs]

I did everything yet when I click launch it says 'Could not patch!' You're trying to launch a version you don't have a patch for! Ensure you're using a valid game version, and have the patch for this version in your cultivation install folder. If this means nothing to you, YOU HAVE THE WRONG GAME VERSİON. YOUR GAME VERSİON: 5.1' Idk how to fix this. I would be happy if you could help!

[NotThorny]

As it says, you've got the wrong game version. 5.1 doesn't have a patch file as there is no server for it anyways. You should be following the setup guide for Grasscutter, which tells you to get an earlier supported game version and links you to where you get it.
https://github.com/Grasscutters/Grasscutter?tab=readme-ov-file#quick-setup-guide