Problem during PNG generation with bar chart with only one row

[marco-brendolini]

Hi,

I have a problem with PNG graph generation.
I try to create the PNG when this event is called:

events: {
      animationEnd: function (chartContext, options) {
          try {
              var dataURL = apexChart4.dataURI().then(({imgURI, blob}) => {
                  callCreateGraphs('{{ id }}_istogram_immediate_total_risks', imgURI);
              })
          } catch (e) {
              console.log(e);
          }
      },
  }

If my bar chart has only one row the image is not generated. I have to insert an empty row to generate correctly the image:

series :[{
      data: [
          {
              x: {{ graphicIncidenceTotalImmediateRisksData.0.label | raw}},
              y: {{ graphicIncidenceTotalImmediateRisksData.0.value | raw}},
              fillColor: '#EB8C87',
          },
          {
              x: '',
              y: 0
          }
      ]
  }],

But in this way i have a graph with an empty row and it's a problem for me.

I don't understand why.

Any help is appreciated.

Thank you very much.