Setting up Web Portal on Oracle getting error:ORA-20000: Oracle Text error: DRG-10700: preference (4289209)

When setting up Web portal on Oracle database, getting error:

DBUTL_E0001 Database exception occurred: ORA-29855: error occurred in the execution of ODCIINDEXCREATE routine ORA-20000: Oracle Text error: DRG-10700: preference does not exist: CTXSYS.DEFAULT_LEXER ORA-06512: at "CTXSYS.DRUE", line 160 ORA-06512: at "CTXSYS.TEXTINDEXMETHODS", line 366 
[Thread-5] 2018-01-26 09:56:57 DBUTL_E0001 Database exception occured: ORA-29855: error occurred in the execution of ODCIINDEXCREATE routine ORA-20000: Oracle Text error: DRG-10700: preference does not exist: CTXSYS.DEFAULT_LEXER ORA-06512: at "CTXSYS.DRUE", line 160 ORA-06512: at "CTXSYS.TEXTINDEXMETHODS", line 366

solution:

Create a user MM and a database MM with the following privileges: 
sqlplus.exe SYS@<DB-NAME> as SYSDBA 
  
   -- Delete previous user and database if needed 
   -- DROP USER MM CASCADE; 
  
   CREATE USER MM IDENTIFIED BY MM123!; 
  
   GRANT CONNECT TO MM; 
   GRANT CTXAPP TO MM; 
  
   GRANT CREATE TABLE TO MM; 
   GRANT CREATE VIEW TO MM; 
   GRANT CREATE SEQUENCE TO MM; 
   GRANT CREATE TRIGGER TO MM; 
   GRANT CREATE PROCEDURE TO MM; 
   GRANT CREATE TYPE TO MM; 
  
   GRANT EXECUTE ON CTXSYS.CTX_DDL TO MM; 
   GRANT EXECUTE ON DBMS_LOB TO MM; 
   GRANT EXECUTE ON SYS.DBMS_LOCK TO MM; 
  
   -- If you get the error "Database exception occurred: ORA-01950: no privileges on tablespace 'USERS'" 
   -- ALTER USER MM QUOTA UNLIMITED ON USERS;

If Oracle is on Unix/Linux box, the locale is not properly configured. In which case, DBA should run one the scripts found under <ORACLE_HOME>/ctx/admin/defaults. The one for American English is named drdefus.sql.
This will create the necessary objects.

One more tip is from 
https://community.oracle.com/message/12691120#12691120