Site Backup was run, but the %1 token had no value. Site backup did not occur.%12 Possible cause: The current site's "Backup ...

%11Site Backup was run, but the %1 token had no value. Site backup did not occur.%12

Possible cause: The current site's "Backup Configuration Manager Site Server" Maintenance Task has no value set for its "Backup Destination" field.
Solution: Set the "Backup Destination" field using the Configuration Manager Console.%0