Mixamo unable to use it

Hi, im facing some issues with my PC and Laptop...

while trying to upload a unity FBX,  a message pops up from the top with a red background saying:  Sorry, we had trouble receiving your upload..

I tried everything, but nothing works. I tried to download the standart Animation from Mixamo after the page loads up, in this case i get the message: To many requests..

I tried with 3 different Browser in two different systems..

anyone with the same problem?