The circle of friends has background and horizontal lines. It is very likely that her (his) circle of friends blocked you, or it may be hacked. As long as you can send messages normally, it is estimated that most of them are blocked, or you don't want to show them to you, or you are hiding something. Anyway, it depends. You really can't ask, and most of them are hidden. Even if I showed it to you, it was almost deleted. Of course, there are no exceptions.