Heatmap on Dashboard

Dear ARIS-community,

I'm struggling to create a heatmap on a dashboard (ARIS Connect version 10.0). Does anyone know if there is a howto or tutorial available that explains how to create a heatmap?

My X and Y axis are attributes with a fixed list of text values, like "low", "medium", "high". I've added a column with numeric value as cell value. The axis are visualised but the cells don't show.

Thanks in advance.

Best Regards,

Harm