Symptoms:

You get the following error during expdp or impdp

ORA-39006: internal error
ORA-39213: Metadata processing is not available

 

Solution:

Execute sys.dbms_metadata_util.load_stylesheets to fix this problem
#sqlplus / as sysdba

SQL> execute sys.dbms_metadata_util.load_stylesheets;

PL/SQL procedure successfully completed.

 

For more information please check Oracle Doc ID 402242.1