GetAvatarPath() always return null with Zoom windows API

Description
I setup a default or customized avatar and I can see the avatar in video. After joining a meeting, I can successfully get users information in OnJoin callback, but GetAvatarPath() always 0. Do I miss any settings? Or is there any other way to retrieve it? Thanks!

Error?
No errors, just GetAvatarPath return 0, all other user information is correct.

Windows meeting SDK Version: 6.4.0.62547