help me please aaaaaaaaaaaaaaaaa
Click on their profile link whenever you see it. (He/she should be in your friends list). And then hit the challenge button below their profile picture and stats. If you haven’t already added your friend as a friend on OGS, then you can search for their username by clicking the OGS logo on the top left and then searching for their username in the search bar. Then you can challenge them by doing the above steps(the profile button again), or add them as a friend(another button in the profile link).
I hope this helps!