When parameter is removed, tablespaces not created, error: ORA-28361: master key not yet set

This question was created from comments split from:

error of duplicate file name when trying to create pluggable database.

trying to create a pdb from a noncdb but keep on running into the following error.

I am running the following:

CREATE PLUGGABLE DATABASE ORASOAX USING '/tmp/ORASOAX.xml'

COPY

FILE_NAME_CONVERT = ('+DATA/ORASOAX/', '+DATA/ORASOAX/PDB/'); 2 3

CREATE PLUGGABLE DATABASE ORASOAX USING '/tmp/ORASOAX.xml'

ERROR at line 1:

ORA-65180: duplicate file name encountered -

+DATA/ORASOAX/DATAFILE/sysaux.295.1137067591

ORA-15113: alias name 'PDB' refers to a directory

Any pointers as to what I am doing wrong?