Turn On Access For Members To View Other Member’s In Their Group

In the top right corner, select the Gear Icon (Settings and Configurations). This will take you here:

Within the horizontal navigation bar, select Users. In the drop down, select Groups. This will take you here:

In the Member Settings, look for View Group Users. Select/Deselect the check mark to the left of the setting to turn this ability on or off.

Deselect: Users cannot see other group members
Select: Users can see limited information on their group members