Error including Requestor information information into Personal Info Notification Subject Line

Summary:

We need to include some Requestor's assignment information into the Personal Information Subject Line in the notification

Content (please ensure you mask any confidential information):

Hello community,

I'm trying to add some Requestor's assignment information into the Personal Information Subject Line. The idea is to have some in the Subject Line where the HRs can recognize where the employee is working. An example would be "Change Personal Information for GlobalName (standard) | Business Unit | Legal Entity"

I've followed the documentation to update the Subject Lines. I was able to do it correctly for the Change Assignment Task but I can't do it in the Personal Information Task. I can see in the list of variables that we have the Requestor's info, but I'm receiving an error on the workflow. I'm using, for example, /task:task/task:payload/ns2:getRequestorInformationByPersonIdResponse/ns2:result/ns12:BusinessUnit