Data from the PowerPivot workbook could not be imported because the service account for the workspace database server does ...

Data from the PowerPivot workbook could not be imported because the service account for the workspace database server does not have permission to import data from the PowerPivot workbook. Workbook metadata, however, can be imported. After importing the metadata, you can add pasted or linked table data by using the Paste Append function.

Importing the metadata will cause a script to be run on the Analysis Services server. Do not perform this operation unless you trust the source of the workbook. Do you want to import the metadata?