ORA-31625: Schema string is needed to import this object, but is unaccessible
Cause: An error occurred when attempting to import objects. The schema specified is needed to import this object, but access to this schema is not available
Action: Refer to any following error messages for possible actions. Correct the error, if possible, and try the operation again. If the error occurs again, contact Oracle Customer Support and report the error
https://support.oracle.com/
http://www.oracle.com/