JS UDF: internal javascript functions are disabled

cbq> create or replace function f1() LANGUAGE JAVASCRIPT as 'function f1(a) {return a*10}';

{

    "requestID": "cfc8c18f-85b1-47dc-83ad-725ee81f4519",

    "errors": [

        {

            "code": 3000,

            "column": 86,

            "line": 1,

            "msg": "internal javascript functions are disabled - line 1, column 86, near '...f1(a) {return a*10}'', at: ;"

        }

    ],

    "status": "fatal",