AerospikeError: UDF: Execution Error 1

I have my lua udf in /Users/divya/repos/aerospike-poc/lua/disabled_filter.lua and I am using the below config

modlua: {
    userPath: '/Users/divya/repos/aerospike-poc/lua/',
    systemPath: '/Users/divya/repos/aerospike-poc'
}

During register, I use client.udfRegister(‘lua/disabled_filter.lua’,function (err) {

Also, What is the use of systemPath in config.