When attempting to save or duplicate a map, receiving an error that says “Map header could not be saved” or “Map could not be duplicated”. Looking in the Windows event viewer a message is found in the SmartConnect event log that says “Not-Null property references a null or transient”.
Run this script in SQL Server Management Studio against your SmartConnect database. This will resolve the issue.
UPDATE SmartConnect..Map SET RunMapAsUser=” WHERE RunMapAsUser IS NULL