Trigger - create note in Object

I need help to set status with the right syntax and placeholder, if the trigger is set.

• Used Zammad version: 6.2.0-1707987827.798dd740.jammy
• Used Zammad installation type: package
• Operating system: Ubuntu 22.04.3 TLS
• Browser + version: Edge 121.0.2277.128

Expected behavior:

I have a trigger that creates a note whenever the status changes. Now I want to see the first name, last name, and date with time in the note as well.
I tried it with ‘The ticket was approved by #{user.firstname} #{user.lastname}.’

Actual behavior:

I expected to receive the name of the person who changed the status.
Like this → The ticket was approved by Max Mustermann.
But i get this → 'The ticket was approved by #{user / no such object} #{user / no such object}.

picture of the trigger