When reporting a bug, please provide more details than that. This is the equivalent of saying "my car isn't working" to a mechanic. I'm assuming this is about sprites not appearing. Additional information in this case might include screenshots of the issue, where the sprites aren't appearing specifically, if theres a broken image in its place or if its just gone, and anything else you can think of. If the issue isn't sprites and its something else like "no pokemon appear in teambuilder" please specify what happened exactly.
Regardless, sprites appear to be working for people in general so I'm assuming the issue is on your end. Please try a hard refresh of your web browser to force showdown to re-request the sprites from the server.