A Date Based Object Operation type Job is configured to send a notification to Object Record Task Participants and Owners leading up to a due date. The job is failing to run and reports an error message: Error Operation could not complete: an error was encountered.
There is at least one object record where the record Owner and/or a Task Participant is currently an Inactive user.
For the job to be able to run successfully, the user either needs to be made Active, or they need to be removed from the Owner and/or Task Participant role in the Sharing Settings on the object record(s)
- Vault Help Documentation: Configuring Job Definitions