Right now the level on the hypervolume contour plot is set at 0.01 by default. But if the KDE has too low of a density, it won't plot anything. Either allow the user to set the level as an argument, or come up with some logic to find a better level to plot.
I enabled the user to set the level as an argument but that isn't ideal so leaving this open in case I come up with a better way to intelligently find the level
Right now the level on the hypervolume contour plot is set at 0.01 by default. But if the KDE has too low of a density, it won't plot anything. Either allow the user to set the level as an argument, or come up with some logic to find a better level to plot.