Use Case:- We have created three custom group which are present in one group ty

Use Case:- We have created three custom group which are present in one group type. I need to get list of all users present in my group type. I am able to get list of users but when I am trying to get attributes of users it throws below error.

"Invalid function user"

Please find attached report code..

Sail Report

OriginalPostID-143057

OriginalPostID-143057