When I fire below query at our development database SqlPlus prompt it works fine but same query when fired on production gives me error

select utl_http.request('http://www.yahoo.com') from dual;

The error given on production DB is

ERROR at line 1:
ORA-06510: PL/SQL: unhandled user-defined exception
ORA-06512: at "SYS.UTL_HTTP", line 174
ORA-06512: at line 1

What is stopping me on production database to use utl_http.request?

please reply