RPG MAKER VX YEM ERROR - CANNOT FIND GRAPHICS/ WINDOWS/ BLUE

Hey, guys. I just downloaded the YEM engine for use. I imported all the scripts to my game project from the demo, but when I tried to test start game, the error "cannot find Graphics/ Windows/ Blue" came up. This is odd because the demo of YEM only uses the default graphics of VX (I checked the graphics folder, too, and they were all empty, so it couldn't be just a script error.

Has anyone had this problem or know how to fix it? Thanks.

Okay, I fixed it.

See, I have no idea why a Windows folder was not in the Demo's project folder, yet the program still worked. In any case, I ended up creating a Windows folder in my current game project folder and inserted a window's graphic as "Blue." Ended up working.