Automation for jira extension no longer showing binding variables for script

Summary

When you add a Scriptrunner Execute action to an automation for jira rule the user can click a ? symbol to see binding variables. This currently opens an empty dialog.

Steps to reproduce:

1. Install automation for jira alongside scriptrunner
2. Create a rule with the Scriptrunner `Execute a ScriptRunner script` action
3. Click the ? symbol

Expected:

A modal window shows with binding variables listed

Actual

Modal shows but is empty with just the modal window title