To use this functionality you need to set up the "Checklists" custom field.

This could be easily done by the JIRA Suite Utilities post function.

Setup instructions for Cloud instances: Jira Misc Workflow Extensions (JMWE) - Cloud

Setup instructions for Server instances: Jira Misc Workflow Extensions (JMWE) - Server

Atlassian documentation is available here. 

Currently, JIRA Suite Utilities (JSU) team is working on porting utilities functions to JIRA Cloud directly. Hopefully, soon there will be no need for a separate add-on to manage these post-functions.

However, as at this moment installations of JSU from the add-on market are disabled, new users cannot install JIRA Suite Utilities.

Here is a tread with more details.

For any questions or feature requests contact us: smartchecklist@railsware.com