I am hit with other issue 'Ensure that page performance is improved by only rerendering the table and error messages when a use clicks the Add button.' I have used actionRegion to rerender the needed table,chart and messages.still it shows issues.

Trying to check Reports & Dashboards Specialist step 2 and got this error :
 "Challenge Not yet complete... here's what's wrong: 
The 'Sales Manager' dashboard does not have the correct headers and titles for the chart components." But I checked and evrything seems correct.

I am hit with other issue 'Ensure that page performance is improved by only rerendering the table and error messages when a use clicks the Add button.' I have used actionRegion to rerender the needed table,chart and messages.still it shows issues.