The exact message is "This application requires a Java Runtime Environment 1.8.0-1.9.0"
I am running Windows 7 64bit Professional Service Pack 1. I do not have any JRE installed but it sounds like the exe is supposed to use one bundled in. I am running Japanese local but do not have any spaces or non-ascii characters in the file path I am running the exe from.
Good luck on the game!