Problematic legend for any analysis type


I am facing a problem with legends for any analysis I am doing. I have installed Rhino 6 on my new system and have installed LB tools as per instructions. However, I am facing problem with the legend. It remains black and does not show color scale although the analysis results or maps do not create this problem. Any idea on why is this happening?

Below is what I get every time I run an analysis.

Your responses are highly appreciated.

This is an issue with Rh 6. Until it is addressed from their side, this may help.

Thanks, Devang. This was really helpful