BuddyPress.org

I had an issue with both group avatar and member avatar where it would upload just fine but the crop tool never displayed the image. I fixed it by changing the settings in:

Settings > Miscellaneous:

I emptied the field for “Store Uploads in this Folder”

and I used the full path field instead, ie:

http://domain.com/wp-content/uploads

That did it for me. Might help.