I got this error message "ORA-0131 :insufficient privileges DEBUG CONNECT SESSION" trying to start debug PL/SQL hr_pack script using PL/SQL Developer.

This is the console message:
Connecting to the HR database.
Running PL/SQL: CALL DBMS_DEBUG_JDWP.CONNECT_TCP( '192.168.0.66', '49872' )
ORA-01031: insufficient privileges
ORA-06512: in "SYS.DBMS_DEBUG_JDWP", line 68
ORA-06512: online 1
This session needs DEBUG CONNECT SESSION and DEBUG ANY PROCEDURE user privileges.
The process is over.
Disconnecting from the HR database.
Could someone please guide me with this error?
Thanks