JIRA to service Now integration

Hello:

I'm trying to integrate JIRA with Service now and i got the one which helped me a little bit (REST Based ServiceNow / Jira Integration (PoC) | John Andersen )

But while creating a ticket in SNOW it is not creating a corresponding issue in JIRA and I'm seeing below error

A corresponding JIRA Issue has been created:

ID: undefined

Issue Number: undefined

Issue URL: https://jira*****/browse/undefined

Please suggest how to get rid of this error ?