Game not able to load

I open the game file, and I hear the main theme, but no visuals pop up. If i press the action button, I hear mew sound, but still no visuals, and then a box pops up that says "Script 'BitmapCache' line 393: RuntimeError occured. Failed to load the bitmap locatede at Graphics/Characters/clothes/backpack725" I am not a computer guy, so I have no idea what this means. How do i fix it?