Relic Castle

I have followed Luka S.J.'s videos correctly, I've met all the requirements needed to download the latest version, but when I go into the Universal Plugin Installer and launch the Game.exe, I get "RGSS Player has stopped working" immediately. My editor won't even launch now but the base game.exe works. If I remove the plugin everything works fine. I have no idea what went wrong.

This is the tutorial vid I followed with installing the latest version of Universal Plugin Installer for Elite Battle System: