No proper check if Slack/Teams template files exist before they are used

[mountaindude]

What version of Butler are you using?

7.3.2

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?

butler.exe --loglevel info

What operating system are you using?

Windows Server

What CPU architecture are you using?

x86_64

What Qlik Sense versions are you using?

2021-Nov

Describe the Bug

If an incorrect path is set in the config setting Butler.slackNotification.reloadTaskFailure.templateFile (and similar settings for aborted tasks, and Teams alerts) you get this error

error: SLACKNOTIF: TypeError: Cannot read properties of undefined (reading 'statusText')

Suggestion: Check if the template file exist, show error if it doesn't.

Expected Behavior

No response

To Reproduce

No response