Got a call this morning on two SSRS errors that are common: rsAccessDenied and Cannot create a connection to data source 'DataSourceGPCompany'
This article discusses the fixes.
The full text of the errors:
An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'DataSourceGPCompany'. (rsErrorOpeningConnection)
For more information about this error navigate to the report server on the local server machine, or enable remote errors.
rsAccessDenied400The permissions granted to user 'xxx' are insufficient for performing this operation.