Corrplot issue

I am trying to use StatsPlots.corrplot for some analysis, but every time the plot shows the 2d Histogram (upper right plot) just black, with no different coloring for the color gradient.
Is there a way to change or activate the seriescolor.


I have also experienced this issue using Julia version 1.3.1, and StatsPlots version 0.14.6. In particular, I tried implementing the example given in the Github repo, and I obtain the same figure, but all histograms in black:


I have also tried changing the series color with no success.

Same issue using Julia 1.6.2 with StatsPlots v0.14.26.