PropTypes fix

src/features/charts/server/components/SessionsRunningTimeChart.js

@@ -35,8 +35,8 @@ const SessionsRunningTimeChart = ({ data }) => {
   };
 
   CustomTooltip.propTypes = {
-    active: PropTypes.bool.isRequired,
-    payload: PropTypes.object
+    active: PropTypes.bool,
+    payload: PropTypes.array
   };
 
   return (