"Failed to load resource: the server responded with status 403" error In chart

Hello experts;

In my FPM applications I included a chart UIBB to display a PIE graphic. When I test the application the chart is never displayed, instead the "loading" icon is shown. In the console of chrome I see the error: "Falied to load resource: the server responded with status of 403 (Forbidden)":

Any suggestion why the chart is never displayed? Is has to do with the error attached? It could be an missing authority object in the assigned role of the user?

How I can detect the root cause of the problem?

Thanks in advance for the comments.

Best regards