The following data source cannot be used because PerformancePoint Services is not configured correctly. Data source location: ...

The following data source cannot be used because PerformancePoint Services is not configured correctly.

Data source location: %1
Data source name: %2

The PerformancePoint Services Unattended Service Account is not set. The setting is located in "Manage service applications" in SharePoint Central Administration under the PerformancePoint Services management page.