I can´t download any animations

If im logging in in mixamo, first a little message appears, that there was something wrong with my requests. but if im trying to download a animation, the message appears: ,,too many requests". this happens on every account and on every browser and browser mode. i havent any add ons activate right now. but i dont understand the message. i havent download anything succesfully, and i dont know if this message means, that i used it too much (i havent used it at all) or if its just bugged or there are too many people online. i hope you guys have a solution for it