Seems that java component is missing form the Oracle binaries or not working properly.

Error:

ORA-29547: Java system class not available: oracle/aurora/rdbms/Compiler
ORA-29540: class oracle/aurora/rdbms/DbmsJava does not exist

Solution:

1. Check the status of JAVAVM in dba_registory

select comp_id, status from dba_registry;

2. Try to run the utlrp.sql to valid all the invalid objects in the database

@?\rdbms\admin\utlrp.sql

3. JServer not working properly, run this script as SYS:

@?\javavm\install\initjvm

Hopefully initjvm will fix the issue.