hi
This issue could be caused by several reasons. Here are a few things you can check:
Make sure the user who is currently viewing the chart has access to the data in the view. If the view has filters that restrict data based on the user, the chart may not display anything.
Check if there are any filters applied to the chart that conflict with the view's filters. Try removing any filters from the chart and see if the data appears.
Ensure that the chart is configured correctly. Double-check that the chart is using the correct view and that the fields being used in the chart are included in the view.
Check if the chart is published to the correct security roles. If the user doesn't have access to the chart, it won't display.
DAniele