Oracle® Database 11g / 12c / 18c error codes ORA-44416: Invalid ACL: Unresolved principal '[string]'

ORA-44416: Invalid ACL: Unresolved principal '[string]'

Oracle Error Code: ORA-44416

Cause: An unresolved principal is found in an ACE in the ACL.

Action: Make sure the principal is a valid user or role in the system.