Operation Failed PivotTable

I did a report in 2013, and powerpivot excel. In this report I have a chart and slicer (filter). 

The worksheet is equal to this video tutorial: http://youtu.be/hPTkKYpvvRY 

Whenever I open the spreadsheet in Excel Web Access this error appears: Failed Operation PivotTable. 

Does anyone know how to solve this problem?