Variable not pass in job

I try to pass a variable in the job. but there are display empty variable.

Here is my BPMN :

source code

Display empty variable
2019/07/17 12:26:44 In job 2251799814899895
2019/07/17 12:26:44 Variable: map[]
2019/07/17 12:26:44 Failed to complete job 2251799814899895

Hi @sandip, This could happen if you have installed a mismatched version of the client lib. Make sure the broker version and client lib version match.

ok done is client lib mismatched issue.