ORA-16804: one or more configuration properties in metadata have invalid values
Cause : Data Guard broker health check detected that one or more configuration properties in the broker's configuration metadata have invalid values. The property values have been changed while broker management of the database is disabled.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Check Data Guard broker log for more details on which properties have invalid values and reset them through the Data Guard broker.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.