I'm looking at https://api.playfab.com/documentation/client/method/AddFriend
I've never seen a "try it" section before, whoa! This must be new?
Anyway, the button doesn't seem to do anything -- in Chrome, it never finishes initializing:
EDIT: Works in Waterfox, but not Chrome. Also, in Chrome, it's already "revealed" -- I don't have to click the "Try It" to see the fields. I tried to click it anyway, to init, but that didn't help.