Unable to Sync Comments From RITMs to and from custom field

Hi there,

While comments are flying nicely between ServiceNow INCs and JIRA, the same can not be said of the comments from our RITMs. We have a custom field for our IT Work Notes, a Journal Entry field named u_journal_2. No matter what I try it seems to throw up an error of some kind, either a type mismatch (String instead of List) or, and currently, No such property: issue for class: Script355.

I have followed the guide on " How to Sync Comments in Jira Cloud", trying replacing the “replica.comments” to “replica.u_journal_2” but it either doesn’t work or there is an error.

I feel like I have tried everything but it might be that I am not understanding what it is trying to do properly. Any help would be much appreciated!