Suppress zero values in a pie chart

Hi there,

I have a pivot table looking at audit checks, and the number of fails on those checks, and a pie chart pointing to that pivot. You can filter the pivot by month, and sometimes, the error values will be zero.

I want the pie chart to ignore zero values, which may chop and change as you change the filter.

I cannot for the life of me find a solution to this - and online help seems to focus on deselecting zero from the filter but it's month, not values.

I've attached my spreadsheet.

Thanks in advance for any suggestions!!!