KB38348: "Data loading has failed! Object with ID and type 34 (User) is not found in metadata. It may have been deleted." error message appears when doing a scheduled data load in MicroStrategy Enterprise Manager

SYMPTOM:
 
In Strategy Enterprise Manager 9.x, running a scheduled data load may result in the following error message:
 

 
Additionally, the error is logged in the MSTRMigration.log as such:
 
Sample Code/Error
Object with ID 'A6692CBB46C9B36E59E202A0273AB22F' and type 34 (User) is not found in metadata. It may have been deleted.
 
CAUSE:
 
This issue is caused by an inconsistency with user/group relationships in the Metadata.
 
ACTION:
 
Contact Strategy Technical Support for an update on this issue.