Google chart in Google sheet not showing values on click anymore

[Edwinzap]

Hello everyone,

I use the google forms and google sheets. Inside these google sheets I use the google chart.

I put every google charts in a google site. It worked really well but one week ago, a friend tell me that he could not see anymore the chart values by clicking on it.

I can show the values if I click on the chart in the google sheet but not anymore in the google site. I tried with Iframe (publish ->Iframe) but it's the same problem.

Is this a problem with an update ? How can I solve this ? I really need to see the values (number instead of percent).

I use pie and bar charts.

Thanks !