How to make attachments mandatory on Service Portal Catalog Item?

[MBarrott]

Looked up various methods to get this working (script includes, Catalog Client Scripts, UI Scripts) etc but have not found anything that currently works. 

Is there a simple solution to make sure that attachments are mandatory for a specific Catalog Item?

I followed the steps in this KB but it returned no results: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0743672

I did notice an info message stating "

This catalog client script is not VA supported due to the presence of the following variables in the script: document.getElementById, getSCAttachmentCount"

[Brad Bowman · Accepted solution]

[MBarrott]

Thank you, @Brad Bowman ! I'm honestly mad I overlooked such a simple adjustment.