The error message that gets displayed is due to your slow internet connection.
How to fix it:
1. Open the grand fantasia folder
2. In the main folder with the exe, there should be a file called (LuncherMod)... Not LauncherMod!!!
3. Open up the file and scroll down to OPT_TIMEOUT = 60 and change the 60 to 3600
4. Launch the patcher and it will work!