Hi,
we have an actual problem:
We have an objectType in Assets that includes all employees with a few attributes. One of the abttributes is the supervisor as a user attribute.
Furthermore we have a customfield with the type "Assets readonly object" which shows the reporters employee object.
Now we want to build an automation that automatically fills the Request participant with the Supervisor attribute.
I have tried the following:


But it does not work an I've got an error message:

Do you have any idea about that?
Thank you!