its because of ikagura mod. (sorry if i messed his name)Have you unzipped the game, or are you trying to launch the game from inside the zip file? I cannot recreate this error nor has anyone else reported it, so I feel like something must messed up on your end.
If you can, please re-download the game and latest mod, unzip them both in that order and try again.
I instaled his mod just as instructed and this was the result. When i deleted his files, and restored original script file, everything is working correctly.
Sorry to have bothered you, but it would be really awesome if you could make it so that both mods work together.