Error during the creation of new oracle database

ERROR: ORA-06553: PLS-213: package STANDARD not accessible

This error is due to the standard package not being accessible, even though the database says it is created.  The database will be unusable until resolved.

Solution:

Execute the following scripts catalog.sql, catproc.sql, and utlrp.sql.

@?\rdbms\admin\catalog.sql

@?\rdbms\admin\catproc.sql

@?\rdbms\admin\utlrp.sql