The Dashboard designer is opening but when i tried on using Excel Services Template to connect to my SharePoint site, there was an error on Loading Document Library. it said
PerformacePoint Services could not connect to the specified data source. Verify that either the current user or Unattended Service Account has read permissions to the data source, depending on your security configuration.Also verify that all required
connection information is provided and correct.
The Document Library cannot load normally, and the excel workbook cannot load either. How could I corrctly connect to my SP site?