Error During IMPDP in oracle database 12c
The error message is self-explanatory:

ORA-01918: user 'XXXXXX' does not exist


Look at the log output for your expdp execution. If it does not contain the following:

Processing object type SCHEMA_EXPORT/USER
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE


... then the users &amp; grants were not exported in the first place, and so were not created when importing. 

FULL=Y does not solve the problem when the users were not exported in the first  place.

Check that the exporting user, hmis has the CREATE USER grant, then re-export the data.