Hi, i also have the same problem, and the suggestion above does not work. However, i think i know what the problem is. The first crop works, but the second larger one does not. I use standard avatars, the ones you can download everywhere. These are too big for the thumbnail, so you are asked to crop them by selecting a small area. That works.
Then you get to the second crop, but the avatar you upload is smaller than the crop rectangle. It’s bumping to the thumbnail that’s right next to it, so the moment you select that rectangle, it’s no longer working!
If you upload a large image, the second crop will work, because the image is then larger than the cropping rectangle.
I wish there were an option where one can just upload the avatar AND the thumbnail. That will make things a lot easier.
