GE 4.2.0: “charting view” fails to display,

GE 4.2.0: “charting view” fails to display,

I couldn’t figure out why, sometimes, the “charting view” fails to display the charts as it is clicked

/customer/servlet/servlet.FileDownload?file=00P6000000eluJ6EAI

Is this a bug?

Thank you

Best

Jamal