How to capture person who transitioned workflow?

[zzalowitz]

Hi - I have a custom field for "UI Mockup Requestor" which is a "User Picker (single user)" type custom field. I'm trying to set up an automation rule to capture the person that triggered the flow (status transition) into this field.

In the Automation rule, I'm trying to get 

{{initiator.displayName}} value to drive into this field above that is custom field. The automation rules say it's not working

"(Specify a valid value for customfield_11114 (customfield_11114))"

Is the syntax not right in the automation rule,or is the custom field type not right?

[Mark Segall]

HI @zzalowitz - If you're copying from one user field to another, you don't use ".displayName".  You should be able to get the desired result using just {{initiator}}