Mixamo does not accept Obj files.

Mixamo does not accept the same file that it accepted me yesterday. I am trying to upload an Obj file. Mixamo tells me that the file has bones, this is impossible because it is an Obj file.The file is approximately 71 MB. I've uploaded it before. I use Mixamo almost daily.I tried uploading a very simple file of only 357 KB and it accepted normally. My deduction is that Mixamo is having problems.