I am trying to upload some new achievement icons but it's not working, either with the individual upload or the multiple icon upload. On the multiple icon upload page it shows "Internal Server Error" when I try to use it. I am uploading 512x512 JPG files, like I have many times in the past. The game ID is amzn1.application.b6654f83b52d4820beee6487926c08d8. Thanks!