Oracle Solution for Error ora-39109

Solution for Oracle Error ORA-39109

ORA-39109: Unprivileged users may not operate upon other users' schemas

What triggered the Error:

An unprivileged user attempted to reference another user's schema during a Data Pump operation. Because of this, no schemas were were selected for the job.

What should we do to fix it:

Retry the operation under a username owning the schema.