4
I made some discoveries:
The notifications are working but something is not configured right as the are behaving rather strangely.
1. They seem to work with users created after the re-installation but not the previous one, although this is not absolute.
2. No notifications get created when it is the Admin creating the tickets on behalf of another person.
3. If another Admin creates a ticket for another user, only the email specified in the cron job gets the email, not the person the ticket is intended to.
4. If I create a response for another user, the same happens the cron job email gets the notification but not the user it is intended to.