试了好几遍了...也不知道哪有问题.

等一个解决方案

ERROR on mapping character: Unsupported FBX type. Please use FBX files 2013 or earlie

请问下解决了么？

我也是

Mixamo支持3种文件格式上载：FBX，OBJ，ZIP。
确保FBX文件的“嵌入媒体”已打开，以上传纹理。
OBJ文件不包含纹理，使字符显示为灰色。
要显示.obj文件的纹理，请将.obj，.mtl和纹理放入.zip文件中，然后上传整个.zip文件。

Note:
Mixamo supports 3 file formats for upload: FBX, OBJ, ZIP.
Make sure "embed media" is turned on for FBX files to upload your textures.
OBJ files don't include textures, making characters appear gray. To show textures for an .obj file, put the .obj, .mtl and textures into a .zip and upload the whole .zip file.

导入FBX格式的文件就可以了，记得带上纹理