Get document information in a fusion scenario

Hi, I'm working on a scenario that triggers when a task status is updated to be completed. It gets the task details and if there are documents associated with task, it should get the details like document id and name. I was able to get the task details and find if task has documents or not but when I do read a related record on task, I'm not able to get document details. 

Scenario : 

 Result of read a record module:

Configuration of read a related record module:

Result of read a related record module:

 Am I missing any configuration? Thanks in advance!