Startup assert failure if custom property used for reload task fail/abort notifications don't exist

[mountaindude]

What version of Butler are you using?

8.5.3

What version of Node.js are you using? Not applicable if you use the standalone version of Butler.

No response

What command did you use to start Butler?

...

What operating system are you using?

WIndows Server

What CPU architecture are you using?

x86_64

What Qlik Sense versions are you using?

2022-Aug

Describe the Bug

If custom properties don't exist there will be a rather non-descriptive error in the logs:

error: ASSERT CONFIG NEW RELIC: TypeError: Cannot read properties of undefined (reading 'choiceValues')

There should be a better log message that explains what's wrong.

Expected Behavior

No response

To Reproduce

No response