Query refresh fail

I have a query Dashboard file housed in a SharePoint folder. Data source is in another folder also in SharePoint.

I am unable to refresh Dashboard.....encounter below errors :

Query and Refresh Data: Be careful. The query to get the data might be unsafe so you should only refresh the workbook if you trust its source.

External Data Refresh Failed: We were unable to refresh one or more data connections in this workbook.
The following connections failed to refresh:

Does anyone know a work around?