Can't download animations for character any more

I've downloaded a lot of animations for multiple characters in the last couple of months and never had a problem with downloading. Yesterday, I started downloading some animations for the child character "Amy", which was fine at first, but suddenly it stopped working, staying at "Preparing download. Just a moment..." indefinitely. No matter which animation I tried, or even no animation at all, this character will no longer download for me. Other characters are still working. I can also upload the character model I already have and then download animations for that just fine.