if it's an avatar with a dick, add dynamic bones. Usually that is the culprit.

This avatar requires Dynamic Bones that's why y'all keep getting these prefab errorsDaddy_Ghost,

Uploaded fine. Just go to Assets/Model/3.0 Then just drag and drop Alex Variant to the scene on the hierarchy. Save and then upload it's that easy. DON'T FORGET DYNAMIC BONES AND DPS!!!

Daddy_Ghost,
Nevermind ignore the first comment just look for the textures and add it to the body make sure to unlock it first, and the Alex one not the alex variant and you should be able to upload that one

Daddy_Ghost,
okay so im tired af and was uploading another avi... the id prefab.. was missing prefab error.. not mine i should add... but still it isnt the poi im using i have the newest one 8.2 ive tried all them still grey so i just gave up i do believe the avi is there just broken and not worth the time for me to fix tbh

its missing the avi

Daddy_Ghost,
the texture thing could be because you put 8.0 try poi 7.3.50 it should fix that or uncheck shader in shading

this is broken for me the fbx is off it has a weird prefab named id(lots of random letters/numbers) when i tried to do the prefabs that are there that look okay the skin is grey and wont allow me to change the texture( maybe im doing it wrong? i dont think i am ive uploaded many avis and added/deleted many assets in blender ) wasnt the fbx skin either for me it was the skin texture that was grey