ORA-04159
Access to DBMS_MLE functionality is denied
Cause
Executing code dynamically in Multilingual Engine (MLE) requires the use of execution contexts. An execution context is passed to MLE when evaluating a code snippet. The context handle referring to such an execution context provided previously was invalid. Access to dynamic MLE code execution has been disabled for this session.
Action
Start a new session to use DBMS_MLE functionality again.