Try clicking one of the 4 colors - any color, just keep clicking them until something happens. If nothing happens, you might need to reload an autosave. You're essentially waiting until a color lights up, then you click the color that does light up, then two colors will light up (one after the other), wherein you'll click the two colors in order, and so on.
But you're not the first person to have this issue, so I'll look into the code.